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Home My WebLink AboutNCS000554_Renewal Application_202301304(=;DUKE r., ENERGY® January 24, 2023 Ms. Suzanne McCoy NC DEMLR Stormwater Program 1612 Mail Service Center Raleigh, NC 27699-1612 Subject: Duke Energy Carolinas, LLC. Buck Steam Station and Buck Combined Cycle NPDES Industrial Stormwater Permits NCS000578 and NCS000554 Recension, Renewal and Modification Request Duke Energy Buck Combined Cycle 1385 Dukeville Road Salisbury, NC 28146 RECEIVED ED .IAA r, t rota LR,3MwW Program Dear Ms. McCoy: - Duke Energy Carolinas, LLC is submitting herewith, a request to rescind NPDES Stormwater permit NCS000578, and submitting supplemental information in support of renewing and modifying NPDES Stormwater permit NCS000554. Both subject NPDES permits expire on July 31, 2023. Duke Energy is requesting several changes summarized below. I ) Requests recension of Permit NCS000578, this permit was issued to the Buck Steam Station. The Buck Steam Station has been demolished and all industrial activity associated with it has ceased, including closure of the coal pile. All stormwater outfalls associated with the steam station, have been eliminated. The outfalls have either been plugged or removed. This includes outfalls SW- 001, SW-002, SW-003, SW-048, SW-056, SW-073, SW-077, SW-078, SW-079, SW-080 and SW-081. The Outfalls associated with the powerhouse have also been eliminated, that includes outfalls SW-005, SW-007, SW-011, SW-015, SW-016, SW-023, SW-025, SW-027, SW-032, SW-034, SW-035, SW-038, SW-039, SW-058, SW-065, SW-066, SW-067, SW-069, SW-070, SW-071, and SW-072. The only outfalls left, from the steam station, that are included in NCS000578 are outfalls SW-001, SW-002, and SW-075. SW-001 and SW-002 are associated with the Buck Switchyard and Outfall SW-075 is associated with a laydown area, located near the Combined Cycle Plant (NCS000554). Outfalls SW-001 and SW-002, currently permitted in NCS000578, are both outfalls associated with a switchyard that was the primary switchyard for the demolished coal-fired steam station. The switchyard is still in use by Energy Delivery as a standalone switchyard. It is not used by the Buck Combined Cycle Station. The Combined Cycle Station has its own switchyard, the Buck Tie Station, Duke Energy believes that the switchyard formerly associated with the demolished coal-fired steam station meets all requirements in an email from Bethany Georgoulias of the Division of Energy, Mineral and Land Resources (Attachment 10) outlining the requirements for coverage under the NPDES Stormwater Program. The email lists three requirements for a switchyard to be covered under an NPDES industrial SW permit: Ms. Suzanne McCoy Permit NCS000578 and Permit NCS000554 Renewal and Modification Request January 24, 2023 1) A switchyard had been regulated under an NPDES permit or legacy materials from those activities present in the drainage area would be subject. This includes the situations where switchyard runoff comingles with runoff from other areas of a power plant that is covered under an NPDES Permit. 2) A switchyard could also be designated if there is a water quality problem, or it is deemed a significant contributor of pollutants. This is done by agency designation. 3) If a switchyard is considered an integral part of the power plant that is under an NPDES permit, that area is essentially co -located and part of the industrial activity, and it would be subject to the permit. The demolished coal-fired station switchyard that now operates independently of the Buck Combined Cycle Station does not meet any of the requirements to be regulated under an NPDES permit since the coal-fired station has been demolished. Therefore, Duke Energy requests Outfalls SW-001 and SW-002 be removed from coverage under an NPDES industrial SW permit. 2) That NCS000554 be modified to include Outfall SW-075. Duke also requests to move the sampling location of Outfall SW-075 from its current location. The sample location is currently located approximately 1,600 ft from the retention pond and is difficult to sample, generally because of low flow. The new sample location would be located near the discharge flume of the retention pond to allow for ease of sampling and opportunity for higher flow. Attached is the renewal application and modification package for the Buck Combined Cycle Permit (NCS000554) and supplementary information. Should you have any questions please contact Mr. Steve Cahoon at steve.cahoon@duke-energy.com or at (919)-546-7457 or Mr. Dale Wooten at dale.wooten@duke-energy.com or (704)-630-3086. Sincerely, Kris Eisenrieth General Manager Buck Combined Cycle Attachments: Renewal Application Supplemental Information Buck Station Stormwater Permit Renewal Application Attachment 1 EPA Form 1 EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19 NCD043678929 NC0004774 Buck Combined Cycle Station I OMB No.2040-0004 Form U.S. Environmental Protection Agency 1 �'l�EPA Application for NPDES Permit to Discharge Wastewater NPDES GENERAL INFORMATION SECTION• -D.i 1.1 Applicants Not Required to Submit Form'l 1.1.1 Is the facility a new or existing publicly owned 1.1.2 Is the facility a new or existing treatment works treatment works? treating domestic sewage? If yes, STOP. Do NOT complete No If yes, STOP. Do NOT No Form 1. Complete Form 2A. complete Form 1. Complete Form 2S. 1.2 Applicants Required to Submit Form 1 1.2.1 Is the facility a concentrated animal feeding 1.2.2 Is the facility an existing manufacturing, operation or a concentrated aquatic animal commercial, mining, or silvicultural facility that is n. production facility? currently discharging process wastewater? oYes 4 Complete Form 1 0✓ No ❑✓ Yes 4 Complete Form 0 No and Form 2B. 1 and Form 2C. z 1.2.3 Is the facility a new manufacturing, commercial, 1.2.4 Is the facility a new or existing manufacturing, = mining, or silvicultural facility that has not yet commercial, mining, or silvicultural facility that commenced to discharge? discharges only nonprocess wastewater? Ei Yes -> Complete Form 1 No Yes 4 Complete Form No and Form 2D. 1 and Form 2E. 1.2.5 Is the facility a new or existing facility whose discharge is composed entirely of stormwater a associated with industrial activity or whose discharge is composed of both stormwater and non-stormwater? ✓� Yes 4 Complete Form 1 ❑ No and Form 2F unless exempted by 40 CFR 122.26(b)(14)(x) or (b)(15). SECTIONADDRESS, s • i 2.1 Fa6lIftykitne Buck Combined Cycle Station 2.2 EPA Identification Number `0 O J NCD043678929 -O 2.3 Facility Contact Name (first and last) Title Phone number Steve Cahoon Lead Environmental Specialist (919) 546-7457 Q c Email address steve.cahoon@duke-energy.com a d 2.4 Facility Mailing Address zStreet or P.O. box 1385 Dukeville Rd City or town State ZIP code Salisbury NC 28146 EPA Form 3510.1 (revised 3-19) Page 1 EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19 NCD043678929 NC0004774 Buck Combined Cycle Station OMB No. 2040-0004 " 2.5 Facility Location Street, route number, or other specific identifier Q 0 1385 Dukeville Rd a) County name County code (if known) ___ g Rowan 0 City or town State ZIP code o Salisbury NC 28146 SECTIONAND NAICS CODES41 3.1 SIC Codes) Description (op6enal) 4911 Electric Power Generation as m v 0 c� c� z 3.2 NAICS Code(s) Description (optional) �o U 221112 Electric Power Generation, fossil fuel (gas) SECTION OPERATOR INFORMATION (40 4.1 Name of Operator Duke Energy Carolinas, Inc. 0 4.2 Is the name you listed in Item 4.1 also the owner? R ❑✓ Yes ❑ No 4.3 Operator Status 0 1! ❑ Public —federal ❑ Public —state Other public (specify) utility o ❑ Private ❑ Other (specify) 4.4 Phone Number of Operator (704)630-3015 4.5 Operator Address r Street or P.O. Box �o 526 S. Church St City or town State ZIP code o v Charlotte NC 28202 Email address of operator ;, O kris.eisenreith@duke-energy.com SECTION1 1 +1 C 5.1 Is the facility located on Indian Land? _' ❑ Yes ❑✓ No EPA Form 3510-1 (revised 3-19) Page 2 EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19 NCD043678929 N00004774 Buck Combined Cycle Station OMB No. 2040-0004 SECTION's • 41 6.1 I:z sting Environmental Permits (check all it apply and print or type`the corresponding pernrii number for each) m NPDES (discharges to surface m RCRA (hazardous wastes) ❑ UIC (underground injection of c water) fluids) 0 € NC0004774 NCD043678929 W a ❑✓ PSD (air emissions) ❑ Nonattainment program (CAA) ❑ NESHAPs (CAA) 03786T37 .7 .e ❑ Ocean dumping (MPRSA) ❑ Dredge or fill (CWA Section 404) ❑ Other (specify) SECTIO •• 7.1 Have you attached a topographic map containing all required information to this application? (See instructions for CL specific requirements.) ❑✓ Yes ❑ No ❑ CAFO—Not Applicable (See requirements in Form 26.) SECTIONOF 40 8.1 Describe the nature of your business. Electric Power Generation d c ca m 0 w ea z SECTION•• • 40 9.1 Does your facility use cooling water? a ❑✓ Yes ❑ No 4 SKIP to Item 10.1. a, 2 9.2 Identify the source of cooling water. (Note that facilities that use a coaling water intake structure as described at 40 CFR 125, Subparts I and J may have additional application requirements at 40 CFR 122.21(r). Consult with your o Y NPDES permitting authority to determine what specific information needs to be submitted and when.) v Yadkin River 10.1 Do you intend to request or renew one or more of the variances authorized at 40 CFR 122.21(m)? (Check all that apply. Consult with your NPDES permitting authority to determine what information needs to be submitted and when.) ❑ Fundamentally different factors (CWA ❑ Water quality related effluent limitations (CWA Section Section 301(n)) 302(b)(2)) ❑ Non -conventional pollutants (CWA ❑ Thermal discharges (CWA Section 316(a)) Section 301(c) and (g)) ❑✓ Not applicable EPA Form 3510-1 (revised 3-19) Page 3 EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19 NCD04BG78929 NC0004774 Buck Combined Cycle Station OMB No. 2040-0004 SECTION 11. CHECKLIST AND CERTIFICATION STATEMENT 1 , In Column 1 below, mark the sections of Form 1 that you have completed and are submitting with your application. 11.1 For each section, specify in Column 2 any attachments that you are enclosing to alert the permitting authority. Note that not all applicants are required to provide attachments. Column 1 Column 2 ❑✓ Section 1: Activities Requiring an NPDES Permit ❑ wl attachments ❑✓ Section 2: Name, Mailing Address, and Location ❑ wl attachments ❑✓ Section 3: SIC Codes ❑ wl attachments 0 Section 4: Operator Information ❑ wl attachments ❑✓ Section 5: Indian Land ❑ wl attachments .� 0 Section 6: Existing Environmental Permits ❑ w! attachments d 9 ❑� Section 7: Map wl topographic ❑✓ ❑ wl additional attachments ma ❑✓ Section 8: Nature of Business ❑ wl attachments ❑✓ Section 9: Cooling Water Intake Structures ❑ wl attachments m ❑ Section 10: Variance Requests ❑ wl attachments a c ❑� Section 11: Checklist and Certification Statement ❑ wl attachments x m 11.2 Certification Statement s U 1 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. Name (print or type first and last name) Official title Kris Eisenreith General Manager II - Regulated Stations i Signature Date signed EPA Form 3510-1 (revised 3-19) Page 4 Buck Station Stormwater Permit Renewal Application Attachment 2 EPA Form 2F EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19 NCD043678929 NC0004774 Buck Combined Cycle OMB No. 204N004 Form U.S Environmental Protection Agency 2F vEPA Application for NPDES Permit to Discharge Wastewater NPDES STORMWATER DISCHARGES ASSOCIATED WITH INDUSTRIAL ACTIVITY SECTIONOUTFALL LOCATIONrt 1.1 Provide information on each of the c1lib s ouffalls in the table below Outfall Receiving Water Name Latitude Longitude Number 001CC Yadkin River 35' 42' 30" N 80, 22' 40" W c 0 075 Yadkin River 35° 42 49" N so* 22' 22" W 0 O I p O ! N SECTION 2. IMPROVEMENTS I 2.1 Are you presently required by any federal, state, or local authority to meet an implementation schedule for constructing, upgrading, or operating wastewater treatment equipment or practices or any other environmental programs that could affect the discharges described in this application? ❑ Yes ❑✓ No 4 SKIP to Section 3, 2.2 Briefly identify each applicable project in the table below. Brief Identification and Affected Outfalls Final Compliance Dates Description of Project gist outfall numbers) Source(s) of Discharge Required Projected d E 0 E 2.3 Have you attached sheets describing any additional water pollution control programs (or other environmental projects that may affect your discharges) that you now have underway or planned? (Optional Item) ❑ Yes ❑ No EPA Form 3510-21' (Revised 3-19) Page 1 EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19 NCD043678929 NC0004774 Buck Combined Cycle OMB No. 2040-0004 3.1 Have you attached a site drainage map containing all required information to this application? (See instructions for CD M_c specific guidance.) c ® Yes ❑ No SECTIONPOLLUTANT SOURCES,i 4.1 Provide information on the facility's pollutant sources in the table below. Outfall Impervious Surface Area Total Surface Area Drained Number (within a mile radius of the faaliiy) (within a mile radius of the facirdy) specify units specify units 07S 13.4 acres 36.3 acres specify units specify units 001 CC 10.8 acres 18.9 acres specify units specify units specify units specify units specify units specify units specify units specify units 4.2 Provide a narrative description of the facility's significant material in the space below. (See instructions for content requirements.) Outfall 075 - Laydown yard, trailers, construction storage yard warehouse, construction material laydown, outage m � laydown. oOutfall 001 CC - lube oil, diesel fuel, mineral oil, ammonia, raw water treatment chemicals, and cooling tower y treatment chemicals. See the attached stormwater permit renewal application narrative for a more detailed description. 0 a 4.3 Provide the location and a description of existing structural and non-structural control measures to reduce pollutants in stormwater runoff. See instructions forspecificguidance.) Stormwater Treatment Codes Outfall from Number - Control Measures and Treatment Exhibit 2F-1 gist) 075 retention pond 1-U 001 CC retention pond 1-U EPA Form 3510-2F (Revised 3-19) Page 2 EPA Idenfification Number NPDES Permit Number Facility Name Form Approved 03/05/19 NCO043678929 NCOOD4774 Buck Combined Cycle OMB No, 2040-0004 SECTION•N STORMWATER 1 5.1 t certify under penalty of law that the outfall(s) covered by this application have been tested or evaluated for the presence of non-stormwater discharges. Moreover, l certify that the outfalls identified as having non-stormwater discharges are described in either an accompanying NPDES Form 2C, 2D, or 2E application. Name (print or type first and last name) Official title Kris Eisenrieth General Manager, Buck Combined Cycle Signature Date signed rn 5.2 Provide the testing information requested in the table below. Outfall Onsite Drainage Points o Number Description of Testing Method Used Date(s) of Testing Directly Observed . During Test 075 Visual 10/01/2020 overland discharge path 0 c 001 CC Visual 3/25/2020 overland discharge path 0 SECTIONOR 1 6.1 Describe any significant leaks or spills of toxic or hazardous pollutants in the last three years. N — None `0 ur d c �a u in SECTIONDISCHARGE INFORMATION1 See the instructions to determine the pollutants and parameters you are required to monitor and, in turn, the tables you must o complete. Not all applicants need to complete each table. E7.1 Is this a new source or new discharge? ❑ Yes 4 See instructions regarding submission of ❑ No 4 See instructions regarding submission of CDestimated data. actual data. Tables A, B, C, and D Have you completed Table A for each outfall? Mn7.2 0 ❑ Yes ❑ No EPA Form 3510-2F (Revised 3.19) Page 3 EPA Identification Number NPDES Perm t Number Facility Name Forth Approved 03/05/19 NCD043678929 NC0004774 Buck Combined Cycle OMB No. 2040-0004 7.3 Is the facility subject to an effluent limitation guideline (ELG) or effluent limitations in an NPDES permit for its process wastewater? 0 Yes ❑ No 4 SKIP to Item 7.5. 7.4 Have you completed Table B by providing quantitative data for those pollutants that are (1) limited either directly or indirectly in an ELG and/or (2) subject to effluent limitations in an NPDES permit for the facility's process wastewater? ❑✓ Yes ❑ No 7.5 Do you know or have reason to believe any pollutants in Exhibit 2F-2 are present in the discharge? ❑✓ Yes ❑ No 4 SKIP to Item 7.7. 7.6 Have you listed all pollutants in Exhibit 2F-2 that you know or have reason to believe are present in the discharge and provided quantitative data or an explanation for those pollutants in Table C? ❑✓ Yes ❑ No 7.7 Do you qualify for a small business exemption under the criteria specified in the Instructions? ❑ Yes 4SKIP to Item 7.18. ✓❑ No 7.8 Do you know or have reason to believe any pollutants in Exhibit 2F-3 are present in the discharge? ❑2 Yes ❑ No 4 SKIP to Item 7.10. M 7.9 Have you listed all pollutants in Exhibit 2F-3 that you know or have reason to believe are present in the discharge in Table C? 0 ❑✓ Yes ❑ No 0 7.10 Do you expect any of the pollutants in Exhibit 2F-3 to be discharged in concentrations of 10 ppb or greater? ❑ Yes ❑✓ No 4 SKIP to Item 7.12. ,° _= 7.11 Have you provided quantitative data in Table C for those pollutants in Exhibit 2F-3 that you expect to be discharged in E, concentrations of 10 ppb or greater? c ❑✓ Yes ❑ No 7.12 Do you expect acrolein, acrylonitrile, 2,4-dinitrophenol, or 2-methyl-4,6-dinitrophenol to be discharged in concentrations of 100 ppb or greater? ❑ Yes ❑✓ No 4 SKIP to Item 7.14. 7.13 Have you provided quantitative data in Table C for the pollutants identified in Item 7.12 that you expect to be discharged in concentrations of 100 ppb or greater? ❑ Yes ❑✓ No 7.14 Have you provided quantitative data or an explanation in Table C for pollutants you expect to be present in the discharge at concentrations less than 10 ppb (or less than 100 ppb for the pollutants identified in Item 7.12)? ❑ Yes ❑✓ No 7.15 Do you know or have reason to believe any pollutants in Exhibit 2F4 are present in the discharge? ❑ Yes ❑✓ No 4 SKIP to Item 7.17. 7.16 Have you listed pollutants in Exhibit 2F4 that you know or believe to be present in the discharge and provided an explanation in Table C? ❑ Yes ❑✓ No 7.17 Have you provided information for the storm event(s) sampled in Table D? ❑✓ Yes ❑ No EPA Form 3510-2F (Revised 3-19) Page 4 EPA Identification Number NPOES Permit Number Facility Name Form Approved 03105/19 NCD043678929 NC0004774 Buck Combined Cycle OMB No. 2040-0004 .p Used or Manufactured Toxics 7.18 Is any pollutant listed on Exhibits 217-2 through 2F-4 a substance or a component of a substance used or manufactured as an intermediate or final product or byproduct? 0 ❑ Yes ❑✓ No 4 SKIP to Section 8. o. a . 7.19 List the pollutants below, including TCDD if applicable. 1. 4. 7. d R 2. 5. 8. 0 3. 6. 9. SECTION 8. BIOLOGICAL TOXICITY TESTING DATA (40 CFR 122.21 (g)(1 1)) 8.1 Do you have any knowledge or reason to believe that any biological test for acute or chronic toxicity has been made on any of your discharges or on a receiving water in relation to your discharge within the last three years? O ❑✓ Yes ❑ No 4 SKIP to Section 9. }. 8.2 Identify the tests and their purposes below. ac Test(s) Purpose of Test(s) Submitted to NPOES Oen4iiWng Authority? Date Submitted 0 ~ Chronic Toxicity Outfall 001A Whole Effluent Toxicity ❑✓ Yes ❑ No 09/22/2022 Chronic Toxicity Outfall 007 Whole Effluent Toxicity ❑✓ Yes ❑ No 12/05/2022 0 ❑ Yes ❑ No m SECTION-. CONTRACT ANALYSIS INFORMATION 9.1 Were any of the analyses reported in Section 7 (on Tables A through C) performed by a contract laboratory or consulting firm? ❑✓ Yes ❑ No 4 SKIP to Section 10. 9.2 Provide information for each contract laboratory or consulting firm below. Laboratory Number t Laboratory Number 2 Laboratory Number 3 Name of laboratory/firm Pace Analytical Services - Pace Analytical Services - Duke Energy Asheville NC Huntersville INC Laboratory wo 0 c -ca Laboratory address 'o 2225 Riverside Drive 9800 Kincey Avenue Suite 100 13339 Hagers Ferry RD ea Asheville NC 28804 Huntersville NC 28078 Huntersville INC 28078 c Q L c Phone number v (828) 254-7176 (704) 875-9092 (980)875-5245 Pollutant(s) analyzed total kjeldahl nitrogen, BOD, Oil and Grease, pH copper, total nitrogen, ammonia, phosphorus, COD T55 See attached for Outfall 075 Contract Analysis Information EPA Form 3510-21' (Revised 3-19) Page 5 EPA IdentifEoation Number NPDFS Permit Number Facility Name Form Approved 03/05/19 NCD043678929 NC0004774 Buck Combined Cycle OMB No. 2040-0004 SECTION1 CHECKLIST AND CERTIFICATION In Column 1 below, mark the sections of Form 2F that you have completed and are submitting with your application. For 10.1 each section, specify in Column 2 any attachments that you are enclosing to alert the permitting authority. Note that not all applicants are required to com fete all sections or provide attachments. Column 1 Column 2 ❑✓ Section 1 ❑ wl attachments (e.g., responses for additional outfalls) ❑ Section 2 ❑ wl attachments ✓❑ Section 3 ❑,r wl site drainage map 0 Section 4 El wl attachments 0 Section 5 ❑ w/ attachments El Section 6 ❑ w/ attachments s ✓❑ Section 7 ❑ Table A ❑ wl small business exemption request 0 Table B 0 wl analytical results as an attachment ✓ Table C 0 Table D ❑✓ Section 8 ❑ wlattachments a Section 9 Elwlattachments (e.g., responses for additional contact laboratories or firms) LA❑✓ x ❑✓ Section 10 ❑ 10.2 Certification Statement 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. Name (print or type first and last name) Official title Kris Eisenreith General Manager, Buck Combined Cycle Signature Date signed / EPA Form 3510-2F (Revised 3-19) Page 6 EPA Identification Number NPDES Permit Number Facility Name Outfall Number NCD043678929 I NC0004774 I Buck Combined Cycle I CC 001 Form Approved 03/05/19 OMB No. 2040-0004 TABLE• • I NON CONVENTIONALPARAMETERS 1 You must provide the results of at least one anal sis for every pollutant in this table. Complete one table for each outfa[I. See instructions for additional details and requirements. Pollutant or Parameter `Maximum Daily Discharge (specify units) Average Daily Discharge (specify units) Number of Storm Events Sampled Source of Information (new sourcelnew dischargers cnl)r use codes in instructions ) Grab'Sample Taken During First 30 Minutes FlouwWelghted Composite -__ .; Grab Sample Taken During First 30 Minutes FlovwWelghted Composite ....., .: _ 1. Oil and grease <4.9 mg/I <4.9 mg/I 1 2. Biochemical oxygen demand (BOD5) 9.0 mg/L 9.0 mg/L 1 3. Chemical oxygen demand (COD) < 25 mg/I <25 mg/I 1 4. Total suspended solids (TSS) 9.8 mg/I 9.8 mg/I 1 5. Total phosphorus <0.05 mg/I <0.05 mg/I 1 6. Total Neldahl nitrogen (TKN) 0.57 mg/I 0.57 mg/I 1 7. Total nitrogen (as N) 0.57 mg/I 0.57 mg/1 1 pH (minimum) 7.1 STU 7.1 STU 1 8. pH (maximum) 8.4 STU 8.4 STU 1 1 Sampling shall be conducted according to sufficiently sensitive test procedures (i.e., methods) approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or required under 40 CFR chapter I, subchapter N or 0. See instructions and 40 CFR 122.21(e)(3). EPA Form 3510-2F (Revised 3-19) Page 7 EPA Identification Number NPDES Permit Number Facility Name WWI Number NCD043678929 I NC0004774 I Buck Combined Cycle I CC 001 Form Approved 03A5119 OMB No. 2040.0004 TABLE B. CERTAIN CONVENTIONAL AND NON CONVENTIONAL POLLUTANTS (40 CFR 122.26(c)(1)(i)(E)(4) and 40 CFR 122.21(g)(7)(vi)(A)), List each pollutant that is limited in an effluent limitation guideline (ELG) that the facility is subject to or any pollutant listed in the facility's NPDES permit for its process wastewater (if the facility is operating under an existing NPDES permit). Complete one table for each outfall. See the instructions for additional details and requirements. Pollutant and CAS Number (if available) Maximum Daily Discharge s e ' units Average Daily Discharge (sped units Number of Storm led Events Sampled Source of Information (new sourcetnew dischargers onlT use codes in instructions) Grab Sample Taken During First 30 Minutes Flow -Weighted Composite Grab Sample Taken During First 30 Minutes Flow -Wei ghted Composite Ammonia <0.1 mg/1 <0.1 mg/1 1 Nitrate/Nitrite <0.04 mg/I <0.04 mg/1 1 t Sampling shall be conducted according to sufficiently sensitive test procedures (i.e., methods) approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or required under 40 CFR chapter I, subchapter N or 0. See instructions and 40 CFR 122.21(e)(3). EPA Form 3510-2F (Revised 3-19) Page 9 EPA Identification Number NPDES Permit Number NCD043678929 NCOOO4774 Facility Name Buck Combined Cycle Outfall Number Form Approved 03105/19 CC 001 7 OMB No. 2040-0004 TABLE C. TOXIC POLLUTANTS, CERTAIN HAZARDOUS SUBSTANCES, AND ASBESTOS (40 CFR 122.26(c)(11)(i)(E)(4) and 40 CFR 122.21(g)(7)(vi)(B) and (vii))' List each pollutant shown in Exhibits 2F-2, 2F-3, and 217-4 that you know or have reason to believe is present. Complete one table for each outfall. See the instructions for additional details and requirements. Pollutant and CAS Number (if available) Maximum Daily Discharge (sped units Average Daily Discharge s eci units Number of Storm Events Sampled Source of 'Informatlon (new source/new dischargers only; use codes in instructions) :Grab Sample Taken During First 30 Minutes Flow -Weighted Flo Composite Composite Grab Sample Taken During First 30 Minutes Flow -Weighted Composite Copper, Total Recoverable <2 ug/I <2ug/I 1 r Sampling shall be conducted according to sufficiently sensitive test procedures (i.e., methods) approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or required under 40 CFR chapter I, subchapter N or 0. See instructions and 40 CFR 122.21(e)(3). EPA Form 3510-217 (Revised 3-19) Page 11 EPA Identification Number NPDES Permit Number Facility name Outfall Number Form Approved 03105/19 NCD043678929 NC0004774 Buck Combined Cycle CC 001 OMB No.2040-0004 TABLE D. STORM EVENT INFORMATION �40 CFR 122.26(c)(1)(i)(E)(6)) Provide data for the storm event(s) that resulted in the maximum daily discharges for the flow -weighted composite sample. Total Rainfall Durin Number of Hours Between Maximum Flow Rate Duration of Storm .Event; g Beginning of Storm Measured and Total Flowfrom Rain Event Date of StonnEvent Storm; Event .During Rain Event (in hours) End of Previous Measurable Rain,(in gallons orspedy units) (in inches) Event (In 9pm or specify units) 09/30/2022 12 1.30 432 NA NA Provide a description of the method of flow measurement or estimate. NA sampled from a flow controlled structure EPA Form 3510-21' (Revised 3.19) Page 13 Analytical Laboratory Information - Outfall 075 Section 9. Contract Laboratory Analysis Laboratory 1 Laboratory 2 Laboratory 3 Laboratory 4 Name of Duke Energy Laboratory Pace - Asheville Pace — Charlotte Pace — Columbia Laboratory/Firm Laboratory Address 13339 Hagers Ferry Rd 2225 Riverside Dr 9800 Kincey Ave. 106 Vantage Huntersville NC 28078 Asheville NC Suite 100 Point Drive 28804 Huntersville NC West Columbia, 28078 SC 29172 Phone Number 980.875.5245 828.254.7176 704.875.9092 803.791.9111 Pollutant(s) Analyzed aluminum, antimony, biological oxygen oil and grease, mercury arsenic, barium demand, chemical Polychlorinated beryllium, boron, oxygen demand, biphenyls bromide, cadmium, nitrate/nitrite, chromium, copper, phosphorus, total fluoride, iron, lead, kjeldahl nitrogen magnesium, manganese, molybdenum, nickel, selenium, silver, sulfates, thallium, total nitrogen, total suspended solids, zinc Permit Humber I Facility Name I Outfa1O175Number I Form OMBN 03/05/19 Approved 040-0004 TABLE A. CONVENTIONAL AND NON CONVENTIONAL41 You must provide the results of at least one anal sis for every pollutant in this table. Complete one table for each outfall. See instructions for additional details and requirements. Pollutant or Parameter Maximum Daily Discharge (specify units) Average Dally. Discharge (specify unfits EventsrSampled of Storm Source of information (new source/new dischargers only; use codes in instructions} Grab Sample Taken During First 30 Minutes FIow�Weighted Composite•. " Grab Sample Taken During First 30 Minutes Flow -Weighted Composite 1. Oil and grease <4.9 mg/1 <4.9 mg/1 1 2. Biochemical oxygen demand (BOD5) 2.1 mg/1 7.1 mg/1 1 3. Chemical oxygen demand (COD) <25 mg/I <25 mg/1 1 4. Total suspended solids (TSS) 16 mg/1 16 mg/1 1 5. Total phosphorus 0.091 mg/1 0.091 mg/1 1 6. Total Kjeldahl nitrogen (TKN) <0.5 mg/I <05 mg/1 1 7. Total nitrogen (as N) <0.05 mg/I 0.05 mg/1 1 pH (minimum) 7.2 STU 7.2 STU 1 8. pH (maximum) 7.4 sru 7.4 sru 1 I Sampling shall be conducted according to sufficiently sensitive test procedures (i.e., methods) approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or required under 40 CFR chapter I, subchapter N or 0. See instructions and 40 CFR 122.21(e)(3). EPA Form 3510-2F (Revised 3-19) Page 7 EPA Identification Number I NPDES Permit Number I Facility Name I I Outfall Number Form Approved 03A5119 075 OMB No. 2040.0004 TABLE+IN CONVENTIONAL AND •N CONVENT I ONAL POLLUTANTS 1 CFIR 122.26(c)(1)(i)(E)(4)and 41 • + List each pollutant that is limited in an effluent limitation guideline (ELG) that the facility is subject to or any pollutant listed in the facility's NPDES permit for its process wastewater (if the facility is operating under an existing NPDES permit). Complete one table for each outfall. See the instructions for additional details and requirements. Pollutant and CAS Number (if available) Maximum Daily Discharge s units) Average Daily Discharge (sp units Numberof.Storm Events Sampled Source of Information (new sourcehiew dischargers only, use: codes in instructions)` Grab Sample Taken During First 30 Minutes Flomposit e ed C Composite Grab Sample Taken During First 30 Minutes Composite Flow -Weighted Arsenic <1 ug/I <1 ug/I 1 Copper 8.58 ug/I 8.58 ug/I 1 Selenium <1 ug/I <1 ug/I 1 Mercury 1.8 ng/I 1.8 ng/I 1 Chromium <1 ug/I <1 ug/I 1 Nickel 1.02 ug/I 1.02 ug/I 1 Antimony <1 ug/I <1 ug/I 1 Aluminum 0.372 mg/I 0.372 mg/I 1 Fluoride <1 mg/I <1 mg/I 1 Thallium <0.2 ug/I <0.2 ug/I 1 Beryllium <1 ug/I <1 ug/I 1 Lead <1 ug/I <1 ug/I 1 Sulfates 40 mg/I 40 mg/I 1 Barium 0.025 mg/I 0.025 mg/I 1 Manganese 0.121 mg/I 0.121 mg/I 1 Zinc 0.005 mg/I 0.005 mg/I 1 1 Sampling shall be conducted according to sufficiently sensitive test procedures (i.e., methods) approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or required under 40 CFR chapter I, subchapter N or 0. See instructions and 40 CFR 122.21(e)(3). EPA Form 3510-2F (Revised 3-19) Page 9 NPDES Permit Number I Facility Name I I Outfall Number Form Approved 03/05/19 075 OMB No. 2040-0004 TABLE C. TOXIC POLLUTANTS, CERTAIN HAZARDOUS SUBSTANCES, AND ASBESTOS (40 CFR 122.26(c)(1)(i)(E)(4) and 40 CFR 122,21(g)(7)(vi)(B) and (vii))' List each pollutant shown in Exhibits 2F-2, 2F-3, and 2174 that you know or have reason to believe is present Complete one table for each outfall. See the instructions for additional details and requirements. Pollutant and CAS Number (if available) Maximum Daily Discharge (sped units Average Daily Discharge (sped units Humber afStid n " Events Sampled . - . Source of Information new sourceMew dischargers only, use codes in instructions) Grab Sample Taken During First 30 Minutes Flow -Weighted Composite Grab Sample Taken During first 30 Minutes Flow -Weighted Composite Molybdenum 5.98 ug/I 5.98 ug/I 1 PCB's <0.5 ug/I <0.5 ug/I 1 Silver <0.3 ug/I <0.3 ug/I 1 Beryllium <1 ug/I <1 ug/1 1 Boron <0.05 mg/I <0.05 mg/I 1 Bromide <1 ug/I <1 ug/I 1 Nitrate/Nitrite <0.04 mg/I <0.04 mg/I 1 Iron 0.817 mg/I 0.817 mg/I 1 Magnesium 12.1 mg/I 12.1 mg/I 1 I Sampling shall be conducted according to sufficiently sensitive test procedures (i.e., methods) approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or required under 40 CFR chapter I, subchapter N or 0. See instructions and 40 CFR 122.21(e)(3). EPA Form 3510-2F (Revised 3-19) Page 11 EPA identification Number NPDES Permit Number Facility name Outfall Number Form Approved 03105119 075 OMB No. 2040-0004 TABLE•' •' • f Provide data for the storm event(s) that resulted in the maximum daily discharges for the flow -weighted composite sample. Numb r of Hours Between Duration of Storm Event Total Rainfall During Beginning of Storm Measured and Maximum Flow Rate Total Flow from Raln Event - Date of Storm Event Storm Event DuringRain Event (in hours) (in inches) End of Previous Measurable Rain (in gpm or specify units) Qn ga[bns orspedfyunlls� Event 09/30/2022 12 1.30 432 1.5 1,080 Provide a description of the method of flow measurement or estimate. Calculation, storm duration x flow X 60 minutes in an hour EPA Form 3510-2F (Revised 3-19) Page 13 Buck Station Stormwater Permit Renewal Application Attachment 3 Supplemental Information Form SUPPLEMENTAL INFORMATION REQUIRED FOR RENEWAL OF INDIVIDUAL NPDES STORMWATER PERMIT Two copies of each of the following shall accompany this submittal in order for the application to be considered complete: (Do not submit the site Stormwater Pollution Prevention Plan) Initials SC 1. A current Site Map from the Stormwater Pollution Prevention Plan. The location of industrial activities (including storage of materials, disposal areas, process areas and loading and unloading areas), drainage structures, drainage areas for each outfall, building locations and impervious surfaces should be clearly noted. SC2 A summary of Analytical Monitoring results during the term of the existing permit (if your permit required analytical sampling). Do not submit individual lab reports. The summary can consist of a table including such items as outfall number, parameters sampled, lab results, date sampled, and storm event data. SC 3. A summary of the Visual Monitoring results. Do not submit individual monitoring reports. The summary can consist of a table including such items as outfall number, parameters surveyed, observations, and date monitoring conducted. SC 4. A summary of the Best Management Practices utilized at the permitted facility. Summary should consist of a short narrative description of each BMP's in place at the facility. If the implementation of any BMP's is planned, please include information on these BMP's. SC 5. A short narrative describing any significant changes in industrial activities at the permitted facility. Significant changes could include the addition or deletion of work processes, changes in material handling practices, changes in material storage practices, and/or changes in the raw materials used by the facility. SC 6. Certification of the development and implementation of a Stormwater Pollution Prevention Plan for the permitted facility (Sign and return attached form). If the final year analytical monitoring of the existing permit term has not been completed prior to filing the renewal submittal, then the last years monitoring results should be submitted within 30 days of receipt of the laboratory reports. (i.e. do not withhold renewal submittal waiting on lab results) Buck Station Stormwater Permit Renewal Application Attachment 4 Location and Drainage Maps ('Rl.�ards�! ski. f. 1� � �• a � Ri S (I I. K0% 1.#1 "i. fir ulSLMr� �' • Z: } r ASH RAMN 1qG 17E 80UN03.P'!—Y-'—•.— .� vice, a"miDow • i � wa pia � ! - � - . _ it �Yan ` -Trading j I Ff 1417 I Ikdnr,lhri :- 4'II L' - SOURCE: _ ... srS16 U`,Y.S T�PLks3+tP iC hlAr', SALLOW' NY & `0UTKVOKT pEJA�CANGLE, Ot:TAktD FROM THE Uw5 STORE AT 11*6 -rum.uujg I_ .%-04 �t sy _ ORANIINii HA, BEEN MET VlfrH A PROJECTION OF NORTH i GARCuNASTATE Pf AW COORDINATE Cry TEN FIP0= IKIOE3} FIGURE1-1 E EERGY SITE LOCATION MAP " . I SEEP MANAGEMENT PLAN SUCK STEAM STATION SALISBURY• NORTH CAROLINA >"•IM,N ate• Ye IL " WE, ¢. Ma= C _iUy : J --- + �ti®sr >< wsar. oea ati: elia:a �:. • .� : yc - - cwaa�0+ tM l drf �117�•7r,S� �/YVflta 9' i L W rRf: aa9R+rass ERdC6Cp_t911] WCC'i,MSMiI��ILa[R 'v .. N Data Source: Cardno UAS Survey Feburary 2021 Nearmap Imagery January 2022 Not for design 0 250 500 Feet 0 5o 100 Meters t � a r. r S01I.9 4. i rarklYfYt wr.�- w � r4; 60 7 f`"..,' 4 �.. a"�r t rr. `',fit' ra•.`¢'J' 1 J r .s IJ _ r~ �f�''' +► i� tad :t WE �.r�. �; •tip - ,. fi ..'.: Combined Cycle ,�' - _ -' , � � •,. �.iY ,� F , APT . ;( .f .3' •�.' ��s. — ..� i 9i f .; tl, \ ,, '7 r A 'C Y' , *..,r� •. Bock Steam Station i - Industrial �tormwater Drainage Map 1 , Buck Station Stormwater Permit Renewal Application Attachment 5 Summary of Analytical Monitoring BuckCombined Cycle NCS000554- Stormwater Outfall SWO01 Monitoring SU - standard units SA - semi-annual mg/L - milligrams per liter SA-QCA semi-annualor quarterly during during coal or ash transport ug/L - micrograms per liter Disc - discontinued ng/L - nanograms per liter ROS - representative outfall status Compliant no shading NFlow - no flow Tier Requirements for Benchmark Exceedances One exceedance of benchmark value - Inspection and evaluate causes within two weeks after receiving results and implement corrective actions within two months. Monthly sampling frequency of outfall until three Tier I (3) consecutive results are below benchmark value. Tier II Two consecutive exceedances of benchmark value - evaluate causes within two weeks and implement corrective actions within two months. Sampling conducted monthly until three (3) consecutive results are below benchmark value. Other Notes: BuckSteam Station NCS000578-Stormwater Outfall SWO01 Monitoring a5o �a�pp A10O�O\ r�ypp r�y�titi r�yrc,Vp'L rc,1�4' `ctti��b rc,E AI° \t a\�a. a��JyQ Q��`L e°�Jcc `\��\ t°Ji�' 4�• je Q�°` P�°` Q�oo Q�°` Pi°` P�°` �'�°c Parameter°� Q�°� C.°Q Sep 1`� CI`� O� Q�� Q�� Q�� Q�� Q�� Q�� Q�� Comments / Notes Units inches SU mg/L mg/L mg/L mg/L ng/L mg/L ug/L ug/L ug/L I ug/L ug/L ug/L ug/L 12"CMP to Yadkin R. Benchmark NA 6.0-9.0 100 0.010 0.056 0.126 NE 15 <-Detect-> Frequency* SA SA SA SA SA SA SA SA SA * monthly when in Tier status. Date 10/11/2018 2.96 7.5 10 0.00900 0.00122 0.198 8.89avg 1 <4.4 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 Tier I (Zn), (note:copper is close to benchmork) 11-2018 No Flow No flow 12/20/2018 1.61 7.1 <5 0.00230 0.00346 0.246 12.4 1 <4.4 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 1 <0.40 Tier II (Zn), Hg>12 1/29/2019 0.18 7.6 19 0.00540 0.00266 0.180 18.0a g 1 <5.0 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 Tier II (Zn), Hg>12 2-3/2019 No Flow No flow 4/12/2019 0.52 6.9 77 0.0166 0.00135 EaLl 22.3 1 <5.0 <0.40 <0.40 <0.40 <0.40 1 <0.40 <0.40 <0.40 Tier I(Cu), Tier III (Zn), Hg>12 need 30 day Tier III notice to NC 5-10/2019 No Flow No flow 11/12/2019 0.49 7.8 18 0.00761 <0.001 7.76 1 <5.0 <0.40 <0.40 <0.40 <0.40 1 <0.40 <0.40 <0.40 Tier I (1st compliance ("c") Cu), Tier III (Zn), 12/2019 No Flow No flow 1/24/2020 1.36 7.5 93 0.00916 <0.001 12.1avg 1 <5.0 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 Tier I (2nd c: Cu), Tier III (Zn), Hg>12 02/2020 3/3/2020 No Flow 0.16 7.9 <2.5 0.00281 0.00179 2.17avg <5.0 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 No flow Tier III (Zn) 04/2020 No Flow No flow 5/27/2020 0.81 7.7 <2.5 0.00370 0.00120 v 3.26 1 <5.0 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 Tier III (Zn) 6/16/2020 1.89 6.9 3.1 0.00460 0.00122 3.35 1 <5.0 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 1 <0.40 Tier III (Zn) 07/2020 No Flow No flow 8/31/2020 2.23 6.2 <2.5 0.00284 0.00143 0.125 2.29av9 <5.0 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 Tier III (1st c:Zn) 9/17/2020 1.69 7.8 <2.5 0.00391 <0.001 0.115 2.48 <5.0 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 Tier III (2nd c:Zn) 10/28/2020 0.28 7.7 5.4 0.00571 <0.001 3.97avg <5.0 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 Tier III (Zn) 11/11/2020 0.39 7.6 4.1 0.00490 <0.001 i 2.14avg <5.0 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 Tier III (Zn) 12/14/2020 1.16 7.3 41 0.00886 <0.001 0.104 11.9 <5.0 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 Tier III (1st c: Zn) 2/11/2021 0.45 6.8 4.5 0.00358 0,00130 (iii ?!. 2.47 <5.0 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 Tier III (Zn) 3/16/2021 0.55 7.0 3.0 0.00223 0.00144 0.118 1.92 <5.0 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 Tier III (1st c: Zn) 4-8/2021 No Flow No flow 9/21/2021 0.96 1 7.0 1 <2.5 1 0.00591 1 <0.001 I C-! F54 1 2.14 1 <5.0 1 <0.40 1 <0.40 1 <0.40 1 <0.40 1 <0.40 1 <0.40 1 <0.40 Tier III (Zn) 10-12/2021 No Flow No flow 01-02/2022 No Flow No flow 3/23/2022 0.44 1 7.6 1 <2.5 1 0.00454 1 0.00212 1 Co 3 C_- 2.94avg 1 <5.0 1 <0.50 1 <0.50 1 <0.50 1 <0.50 1 <0.50 1 <O.SO 1 <0.50 Tier III (Zn) 4-12/2022 No Flow No flow SU - standard units SA - semi-annual mg/L - milligrams per liter SA-QCA semi-annualor quarterly during during coal or ash transport ug/L - micrograms per liter Disc - discontinued ng/L - nanograms per liter ROS - representative outfall status Compliant no shading NFlow - no flow Tier Requirements for Benchmark Exceedances One exceedance of benchmark value - Inspection and evaluate causes within two weeks after receiving results and implement corrective actions within two months. Monthly sampling frequency of outfall until three (3) consecutive results Tier I are below benchmark value. r. - lier II Two consecutive exceedances of benchmark value - evaluate causes within two weeks and implement corrective actions within two months. Sampling conducted monthly until three (3) consecutive results are below benchmark value. Other Notes: Mercury above 12 ng/L must be reported on the DMR but does not activate a Tier response Buck - Stormwater Outfall SWO02 Monitoring `er ay\ cti�,Ly `yeti yeti `y�� `y�yA `NY r�o r�o r�o r�o` er oParameter oQ h e � Q Q Q Q Q Q Comments / Notes Units inches SU mg/L mg/L mg/L mg/L ng/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 21"CMP to Yadkin R. Benchmark NA 6.0-9.0 100 0.010 0.056 0.126 NE 15 <-Detect-> Frequency* SA SA SA SA SA SA SA SA SA * monthly when in Tier status. Date 10/11/2018 2.96 7.3 1 <5 0.0126 1 0.00373 1 0.227 2.34 1 <5.0 <0.40 <0.40 <0.40 <0.40 1 <0.40 1 <0.40 1 <0.40 Tier I (Cu, Zn) 11-2018 No Flow 12/20/2018 1.61 7.3 1 11 1 0.0131 1 0.00615 1 0.293 11.5 1 <4.5 <0.40 <0.40 <0.40 <0.40 1 <0.40 <0.40 <0.40 Tier II (Cu, Zn) 1-3/2019 No Flow 4/5/2019 0.98 7.7 9.2 0.00945 0.00204 1 0.438 3.41a g <5.0 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 Tier II (Zn, 1st compliance ("c"): Cu) 5-10/2019 No Flow No flow 11/12/2019 0.49 7.5 14 0.00856 0.00147 4.54 <5.0 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 Tier III (Zn, 2nd c: Cu) 12/2019 No Flow No flow 1/24/2020 1.36 7.5 1 6.6 1 0.00694 <0.001 2.85 <5.0 <0.40 1 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 Tier III (Zn) 02/2020 No Flow No flow 3/3/2020 0.16 8.2 7.4 0.0119 0.00164 2.96 <5.0 <0.40 <0.40 <0.40 <0.40 c0.40 <0.40 <0.40 Tler III (Zn), Tier I Cu (next Cu >BM Is Tier III) 04/2020 No Flow No flow 5/27/2020 0.81 6.1 5.8 1 0.00831 0,001741 M19M2.86 1 11 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 Tier III (Zn), Tier I (1st c: Cu - next Cu >BM=Tier III), Note: O&G detection close to bm 6/16/2020 07/2020 1.89 1 7.1 8.9 0.00113 3.54 1 <5.0 No Flow <0.40 <0.40 1 <0.40 1 <0.40 <0.40 <0.40 <0.40 Tier III (Cu, Zn) 30 day notification needed for Cu No flow 8/31/2020 9/17/2020 2.23 1.69 7.0 7.0 9.3 4.3 0.00888 0.00116 <0.001 5.44 2.85 <5.0 <5.0 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 Tier III (Cu, Zn) Tier III (Zn, 1st c: Cu) 10/28/2020 11/11/2020 0.28 0.39 7.6 7.5 <2.5 22 ' 0.00950 0.00127 <0.001 1 0 2.47 2.10 <5.0 <5.0 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 Tier III (Cu, Zn) Tier III (Zn, 1st c: Cu) Tier III (Zn, Cu) Tier III (Zn, Cu) Tier III (Zn, Cu) No flow <0.50 12/14/2020 2/11/2021 3/16/2021 4-8/2021 1.16 0.45 0.55 7.2 22 1 1 <0.001 1 8.49 3.4 OffI 0.00148 t 2.51 12 0.00113 1 3.12 No <5.0 <5.0 <5.0 Flow <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 <0.50 7.1 1 7.3 9/21/2021 0.96 1 6.7 1 4.2 H 0.00624 1 <0.001 a`._,' 1.40 1 <5.0 1 <0.40 <0.40 <0.40 <0.40 1 <0.40 1 <0.40 <0.40 Tier III (Zn, 1st c:Cu) 10-12/2021 No Flow No flow 1-2/2022 No Flow No flow 3/23/2022 0.44 1 7.7 1 3.6 0.00816 1 0.00140 2.00 1 <5.0 1 <0.50 <0.50 <0.50 <0.50 1 <0.50 1 <0.50 1 <0.50 Tier III (Zn, 2nd c:Cu) 4-12/2022 No Flow INo flow SU - standard units SA - semi-annual mg/L - milligrams per liter SA-QCA semi-annualor quarterly during during coal or ash transport ug/L - micrograms per liter Disc - discontinued ng/L - nanograms per liter ROS - representative outfall status Compliant no shading NFlow - no flow Tier Requirements for Benchmark Exceedances One exceedance of benchmark value - Inspection and evaluate causes within two weeks after receiving results and implement corrective actions within two months. Monthly sampling frequency of outfall until three (3) consecutive Tier I results are below benchmark value. Tines ii consecutive results are below benchmark value. Other Notes: Mercury above 12 ng/L must be reported on the DMR but does not activate a Tier response Buck - Stormwater Outfall SWO03 Monitoring ay 6 o�a� eJa` �� boo Ao y 5e`� ova` o�� ho`O �oi1 �o`� �ot1 Nosy Nosy No`y a�Q. Qet or � Pt or or or or Pt Qc Qc Qc or or Qc Qc Parameter ,�o �� a�5 �oLoQ 2�� c,�tio i`�c Comments /Notes Units inches SU mg/L mg/L mg/L mg/L ng/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 10"CMP to Yadkin R. Benchmark NA 6.0-9.0 100 0.010 0.056 0.126 NE 15 <-Detect-> Frequency* SA SA SA SA SA SA SA SA SA * monthly when in Tier status. Date 10/11/2018 2.96 7.5 130 0.0282 0.00980 0.143 697 <4.5 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 Tier I (TSS, Cu, Zn) Hg >12 11-2018 No Flow 12/20/2018 1.61 7.2 90 0.0370 1 0.0124 1 0.317 821 1 <4.4 1 <0.40 1 <0.40 1 <0.40 1 <0.40 1 <0.40 1 <0.40 1 <0.40 Tier II (Cu, Zn) Tier 11st compliance ("c") TSS, Hg >12 1-3/2019 No Flow 4/5/2019 0.98 1 8.1 490 0.0767 10.00413 1 0.230 1 454 1 <5.0 1 <0.40 1 <0.40 1 <0.40 1 <0.40 1 <0.40 1 <0.40 1 <0.40 Tier I (TSS), Tier II (Cu, Zn), Hg>12. 5-12/2019 No Flow No Flow No flow No flow 01-12/2020 1-12/2021 No Flow No flow 1-12/2022 No Flow Now SU -standard units SA - semi-annual mg/L - milligrams per liter SA-QCA semi-annualor quarterly during during coal or ash transport ug/L - micrograms per liter Disc - discontinued ng/L - nanograms per liter ROS - representative outfall status Compliant no shading NFlow - no flow Tier Requirements for Benchmark Exceedances One exceedance of benchmark value - Inspection and evaluate causes within two weeks after receiving results and implement corrective actions within two months. Monthly sampling frequency of outfall until Tier I three (3) consecutive results are below benchmark value. Two consecutive exceedances of benchmark value - evaluate causes within two weeks and implement corrective actions within two months. Sampling conducted monthly until three (3) consecutive results are Tier II below benchmark value. Other Notes: Mercury above 12 ng/L must be reported on the DMR but does not activate a Tier response Buck - Stormwater Outfall SW048 Monitoring \C�v Noi got poi Noc o°r or or mot roc got or or or Parameter ,�o Q� ,�o LoQ �a� ,(,S �a O� QL� Q�� QL� QL� Q�� QL� QL� Comments / Notes Units inches SU mg/L mg/L mg/L mg/L ng/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 15 Steel Pipe to Yadkin R. Benchmark NA 6.0-9.0 100 1 0.010 0.056 0.126 NE 15 <-Detect-> Frequency SA SA SA SA SA SA SA SA SA Date 2H2O18 no qualifying flow no flow 11-12O19 no qualifying flow no flow 21-12O19 no qualifying flow no flow 6/16/2020 1.89 1 7.7 1 410 1 0.0326 1 <0.001 1 0.041 4.53 1 <5.0 1 <0.40 1 <0.40 1 <0.40 1 <0.40 1 <0.40 1 <0.40 1 <0.40 Tier I (TSS, Cu) 7-8/2020 no qualifying flow no flow 9/17/2020 1.69 1 7.6 10 0.0111 1 <0.001 10.0119 5.91 1 <5.0 1 <0.40 1 <0.40 1 <0.40 1 <0.40 1 <0.40 1 <0.40 <0.40 Tier II (Cu), Tier I (1st c: TSS) no flow 10-12/2020 no qualifying flow 1-12/2021 no qualifying flow no flow 1-12/2022 no qualifying flow no flow SU - standard units SA - semi-annual mg/L - milligrams per liter SA-QCA semi-annualor quarterly during during coal or ash transport ug/L - micrograms per liter Disc - discontinued ng/L - nanograms per liter ROS - representative outfall status Compliant no shading NFlow - no flow Tier Requirements for Benchmark Exceedances Tier I One exceedance of benchmark value - Inspection and evaluate causes within two weeks after receiving results and implement corrective actions within two months. Monthly sampling frequency of outfall until three (3) consecutive results are below benchmark value. Two consecutive exceedances of benchmark value - evaluate causes within two weeks and implement corrective actions within two months. Sampling conducted monthly until three (3) consecutive results are Tier II below benchmark value. Other Notes: Mercury above 12 ng/L must be reported on the DMR but does not activate a Tier response Buck - Stormwater Outfall SW056 Monitoring aye a o ti ti ti o a o �,10 a` �N� `o�i �oti ,�,yti 43 tiyo \o yes Nu \°i \°Z \O \°c `°� \°c r r �aN�a`�yea Pjo`r Poor Ptor Poor Poor Parameter ,�o Q� ,�o LoQ 5�� ,(.�` �e O� QL� Q�� QL� QL� QL� QL� QL� Comments / Notes Units inches SU mg/L mg/L mg/L mg/L ng/L mg/L ug/L ug/L ug/L I ug/L I ug/L ug/L ug/L to Yadkin R (alt. if submerged) Benchmark NA 6.0-9.0 100 0.010 0.056 0.126 NE 15 <-Detect-> Frequency SA SA SA SA SA SA SA SA SA Date 2H2O18 no qualifying flow no flow 1H2O19 no qualifying flow no flow 2H2O19 no qualifying flow no flow 1H2O20 no qualifying flow no flow 2H2O20 no qualifying flow no flow 1H2O21 no qualifying flow no flow 21-12O21 no qualifying flow no flow 11-12O22 no qualifying flow no flow 21-12O22 no qualifying flow no flow SU - standard units SA - semi-annual mg/L - milligrams per liter SA-QCA semi-annualor quarterly during during coal or ash transport ug/L - micrograms per liter Disc - discontinued ng/L - nanograms per liter ROS - representative outfall status Compliant no shading NFlow - no flow Tier Requirements for Benchmark Bxceedances Tier I One exceedance of benchmark value - Inspection and evaluate causes within two weeks after receiving results and implement corrective actions within two months. Monthly sampling frequency of outfall until three (3) consecutive results are below benchmark value. Two consecutive exceedances of benchmark value - evaluate causes within two weeks and implement corrective actions within two months. Sampling conducted monthly until three (3) consecutive results are Other Notes: Mercury above 12 ng/L must be reported on the DMR but does not activate a Tier response Buck - Stormwater Outfall SW073 Monitoring h` ,a -1110 1�0'10� �o�a �5�°1 `he, ��1� °'`b.\ �0 Parameter �o �� o h� Qc �o �e La Lr LoQ �� yea P° �e �r (.c �`e Comments / Notes Units inches SU mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L I mg/L mg/L mg/L mg/L I mg/L I ng/L 36"CMP to Yadkin R. - Draining ash haul routes Benchmark NA 6.0-9.0 100 0.0003 0.34 NE 0.065 1 0.003 0.9 0.010 0.335 0.075 1 0.09 0.056 NE 0.126 NE Frequency* SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA * monthly when in Tier status. Date 10/11/2018 2.96 1 7.9 5500 <0.0002 0.00606 1 <0.05 <0.020 <0.001 0.0840 0.191 0.0577 0.0690 <0.001 0.00112 0.00113 0.414 522 Tier I (TSS,Cu, Zn) Hg >12 (note:Ni & Cr near benchmarks) 11-2018 No Flow 12/20/2018 1.61 8.2 35 <0.0002 0.00214 0.138 <0.001 <0.001 1 0.00695 0.0162 0.00926 <0.001 <0.001 <0.001 <0.0002 0.062 16.7 Tier II (Cu), Tier 11st compliance ("c") for TSS & Zn, Hg >12 1/29/2019 0.18 7.0 5.0 <0.0002 <0.001 <0.05 <0.001 <0.001 <0.001 <0.001 0.00104 1 <0.001 <0.001 <0.001 <0.0002 0.022 7.03 Tier II (1st C: Cu), Tier 12nd C: TSS & Zn 2-3/2019 No Flow 4/12/2019 0.52 7.1 370 <0.0002 0.00261 <0.05 <0.001 <0.001 0.00967 0.0162 0.00534 1 0.00765 <0.001 <0.001 0.000214 0.043 103 Tier II (Cu), Tier I (TSS), Hg>12 5-12/2019 No Flow no flow 1/24/2020 1.36 7.4 100 <0.0002 0.00111 <0.05 <0.001 <0.001 0.00677 - 0.00378 1 0.00437 <0.001 <0.001 <0.0002 0.039 24.8 Tier III (Cu), I ier I (1st c: ISS), Hg>11 ISS at benchmark Ilmlt 02-05/2020 No Flow no flow 6/16/2020 1.89 7.2 62 <0.0002 0.00133 <0.05 <0.001 <0.001 0.00504 � 0.00448 1 0.00398 <0.001 <0.001 <0.0002 0.054 9.81 Tier III (Cu), Tier I (2nd c: TSS) 7-8/2020 No Flow no flow 9/17/2020 1.69 7.3 79 1 <0.0002 0.00134 1 <0.05 <0.001 <0.001 0.00718 : i 0,00512 0.00460 <0.001 <0.001 <0.0002 0.044 11.0 Tier III (Cu), Tier I (3rd c: TSS out of Tier Status) 10-11/2020 No Flow no flow 12/14/2020 1.16 1 7.5 240 1 <0.0002 0.00139 1 <0.05 <0.001 <0.001 0.0127 0.00530 1 0.00734 <0.001 <0.001 1 <0.0002 0.059 21.1 Tier III (Cu), Tier I (TSS next >BM=Tierlll), Hg>12 1-12/2021 No Flow no flow 1-12/2022 No Flow no flow SU - standard units < - not detected at the following level SA - semi-annual mg/L - milligrams per liter NA - not applicable SA-QCA semi-annualor quarterly during during coal or ash transport ug/L - micrograms per liter NE - not established Disc - discontinued ng/L - nanograms per liter PCB - polychlorinated biphenyls ROS - representative outfall status Compliant no shading NFlow - no flow Tier Requirements for Benchmark Exceedances One exceedance of benchmark value - Inspection and evaluate causes within two weeks after receiving results and implement corrective actions within two months. Monthly sampling frequency of outfall until three (3) consecutive results are below Tier I benchmark value. Tier II Two consecutive exceedances of benchmark value - evaluate causes within two weeks and implement corrective actions within two months. Sampling conducted monthly until three (3) consecutive results are below benchmark value. Other Notes: Mercury above 12 ng/L must be reported on the DMR but does not activate a Tier response Buck - Stormwater Outfall SW075 Monitoring a�\ o�� ♦ a� �a� a� a� ea5 a� °tea �° 0 �a� a� � 1110 o� e��J c, o` �, o'` �� o� ei as ,ct oQ �o °a o'` °� ra �c e Parameter � Q � 5 p Q� Q� C, C., L � � 1, �` Comments /Notes Units inches SU mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L ng/L 30"CMP to Yadkin R. - Draining ash haul routes Benchmark NA 6.0-9.0 1 100 0.0003 0.34 NE 0.065 0.003 0.9 0.010 0.335 0.075 0.09 0.056 NE 0.126 NE Frequency* SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA�SA-CA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA * monthly when in Tier status. Date 10/11/2018 2.96--F 8.1 5300 0.000324 1 0.00864 1 <0.05 1 <0.020 1 <0.001 1 0.148 1 0.336 0.109 0.123 1 <0.001 1 0.00133 0.00119 1 0.543 1 2180 Tier I (TSS, Cu, Zn, Ag, Pb) Hg >12 11-2018 No Flow 12/20/2018 1.61 7.2 15 <0.0002 0.00139 <0.05 <0.001 <0.001 0.00382 1 0.00338 0.00225 <0.001 <0.001 <0.001 <0.0002 0.039 4.19a g Tier 1 (1 compliance ("c") for TSS, Cu, Zn, Ag, Pb) 1-3/2019 No Flow 4/12/2019 0.52 7.8 1300 <0.0002 0.00224 <0.05 <0.001 <0.001 0.0421 1 0.0985 0.0230 0.0323 <0.001 <0.001 0.000369 0.147 148a„g Tier I (TSS, Cu, Zn)(2nd c: Ag, Pb), Hg>12 5-10/2019 No How no flow 11/12/2019 0.49 7.5 470 <0.0002 0.00168 <0.05 <0.001 <0.001 0.0128 1 0.0318 0.00689 0.00973 <0.001 <0.001 <0.0002 0.064 25.1a g Tier II (TSS, Cu), Tier I (1st c: Zn), Hg>12 12/2019 No Flow no flow 1/24/2020 1.36 7.5 =o <0.0002 <0.001 <0.05 <0.001 <0.001 0.0129 �.�t 0.00526 0.00810 1 <0.001 <0.001 <0.0002 0.051 28.5 Tier III (TSS, Cu), Tier I (2nd c: Zn), Hg>12 02/2020 No Flow no flow 3/3/2020 0.16 7.7 20 <0.0002 1 <0.001 <0.05 <0.001 I <0.001 1 0.00119 1 0.00180 1 <0.001 <0.001 <0.001 <0.001 <0.0002 1 0.014 1.91 Tier III (1st c: TSS & Cu) 04/2020 No Flow no flow 5/27/2020 0.81 7.7 4.5 <0.0002 <0.001 <0.05 <0.001 <0.001 <0.001 0.00117 <0.001 <0.001 <0.001 <0.001 <0.0002 <0.005 1.23a g Tier III (2nd c: TSS & Cu) 6/16/2020 1.89 7.3 81 <0.0002 <0.001 <0.05 <0.001 <0.001 0.00470 (o 4rLl,-, 0.00276 0.00425 <0.001 <0.001 <0.0002 0.023 6.52a�g Tier III (Cu, 3rd c: TSS) 7/2020 No Flow no flow 8/31/2020 2.23 7.4 1_ <0.0002 <0.001 <0.05 <0.001 <0.001 0.00558 ff)a� 0.00308 0.00648 <0.001 <0.001 <0.0002 0.029 14.5 Tier III (Cu, TSS), Hg>12 9/17/2020 1.69 7.9 3.1 <0.0002 <0.001 <0.05 <0.001 <0.001 <0.001 0.00168 <0.001 <0.001 <0.001 <0.001 <0.0002 0.006 2.67a�g Tier III (1st c: Cu & TSS) 10/28/2020 0.28 7.5 4.1 <0.0002 <0.001 <0.05 <0.001 <0.001 <0.001 0.00125 <0.001 <0.001 <0.001 <0.001 <0.0002 0.005 2.44 Tier III (2nd c: Cu & TSS) 11/11/2020 0.39 7.7 7.0 <0.0002 <0.001 <0.05 <0.001 <0.001 0.00115 0.00454 <0.001 <0.001 <0.001 <0.001 <0.0002 0.010 5.39 Tier III (3rd c: Cu & TSS) 12/14/2020 1.16 7.2 29 <0.0002 <0.001 <0.05 <0.001 <0.001 0.00402 0.00809 0.00195 0.00224 <0.001 <0.001 <0.0002 0.020 11.1 Tier III (4th c: Cu & TSS) 1/25/2021 0.36 7.5 9.6 <0.0002 <0.001 <0.05 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.0002 0.020 1.712,,g Tier III (5th c: Cu & TSS) 2/11/2021 0.45 6.1 <2.5 <0.0002 <0.001 <0.05 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.001 <0.0002 0.008 0.713avg Tier III (6th c: Cu & TSS) 3/16/2021 0.55 7.4 51 <0.0002 <0.001 <0.05 <0.001 <0.001 0.00282 1 0.00958 0.00178 0.00256 <0.001 <0.001 <0.0002 0.028 6.51avg Tier III (7th c: Cu & TSS) 4-6/2021 No Flow no flow 7/8/2021 0.31 7.5 1 9.4 <0.0003 <0.001 <0.05 <0.001 I <0.001 <0.001 1 0.00207 0.00102 <0.001 <0.001 <0.001 <0.0002 0.024 1 3.29,,,g Tier III (8th c: Cu & TSS) 8/2021 No Flow no flow 9/21/2021 0.96 7.3 25 <0.0003 <0.001 <0.05 <0.001 I <0.001 <0.001 1 <0.002 0.00221 <0.001 <0.001 <0.001 <0.0002 0.018 1.72a,g Tier III (9th c: Cu & TSS) 10-12/2021 No Flow no flow 01/2022 No Flow no flow 2/23/2022 0.27 7.1 8 <0.0003 <0.001 <0.05 <0.001 <0.001 <0.001 <0.002 <0.001 <0.001 <0.001 <0.001 <0.0002 <0.005 2.11avg Tier III (10th c: Cu & TSS) 3/16/2022 0.62 6.5 <5.1 <0.0003 <0.001 <0.05 <0.001 <0.001 <0.001 <0.002 <0.001 <0.001 <0.001 <0.001 <0.0002 <0.005 2.72z g Tier III (11th c: Cu & TSS) Buck - Stormwater Outfall SW075 Monitoring a�\ o♦� eat a♦ o'ca♦ ♦ °tea a♦ �a♦ '1°� ,10 '�a♦ a♦ ♦ a♦ °� � a♦ /,0 °`a a♦♦ era°` ♦ 1 a e1 `a\ \L\ \ 1�°°� o °'`a \ e� \5 ♦\� tea♦ o �.Qo ` �` ff oParameter c ♦� a ° ep L Comments / Notes Units inches SU mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L ng/L 30"CMP to Yadkin R. - Draining ash haul routes Benchmark NA 6.0-9.0 100 0.0003 0.34 NE 1 0.065 0.003 0.9 0.010 0.335 0.075 0.09 0.056 NE 0.126 NE Frequency* SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA- CA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA * monthly when in Tier status. Date 4-8/2022 No Flow no flow 9/30/2022 1.30 7.4 13 <0.0003 <0.001 <0.05 1 <0.001 <0.001 <0.001 1 <0.002 <0.001 <0.001 <0.001 <0.001 <0.0002 0.009 2.05a�g Tier III (12th c: Cu & TSS) 10-12/2022 Composite sample was collected during event and not a grab sample SU - standard units < - not detected at the following level SA - semi-annual mg/L - milligrams per liter NA - not applicable SA-QCA semi-annualor quarterly during during coal or ash transport ug/L - micrograms per liter NE - not established Disc - discontinued ng/L - nanograms per liter PCB - polychlorinated biphenyls ROS - representative outfall status Compliant no shading NFlow - no flow Tier Requirements for Benchmark Exceedances One exceedance of benchmark value - Inspection and evaluate causes within two weeks after receiving results and implement corrective actions within two months Tier benchmark value. Monthly sampling frequency of outfall until three (3) consecutive results are belo, Tier II Two consecutive exceedances of benchmark value - evaluate causes within two weeks and implement corrective actions within two months. Sampling conducted monthly until three (3) consecutive results are below benchmark value. • dances of •ench-mark value during monitoring periodand implement corrective• • 1 days • for •urth exceedance. Samplingprotocols evaluated and poter ..by ' Other Notes: Mercury above 12 ng/L must be reported on the DMR but does not activate a Tier response Buck - Stormwater Outfall SW077 Monitoring aye yo .•`��va •`��a .`�o�a5�\e �a` .° te♦ °a� `�\� ova` •`��5 . �� \,�o ��.� o'`a` � o'`a` �Je� cyan o�° eta` aa� riot o�Q e�a� r. Parameter Q 5 p Q> C, � �. Comments / Notes Units inches SU mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L ng/L 36"CMP to Yadkin R. - Draining ash haul routes Benchmark NA 6.0-9.0 100 0.0003 0.34 NE 0.065 0.003 0.9 0.010 0.335 0.075 0.09 0.056 NE 0.126 0.126 Frequency SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA SA-QCA Date 10/26/2018 1.98 1 7.2 1 240 <0.0002 0.00689 <0.05 <0.001 I <0.001 0.0116 1 0.0414 0.0158 1 0.0138 1 <0.001 I <0.001 1 <0.0002 1 0.266 1 52.8 Tier I (TSS, Cu, Zn) Hg >12 11-12/2018 No Flow no flow 1-3/2019 No Flow no flow 4/19/2019 0.11 8.2 5.8 <0.0002 0.00195 0.054 <0.001 <0.001 0.0216 1 0.0110 0.00410 0.00129 <0.001 0.00746 <0.0002 0.033 13.7a g Tier II (Cu), Tier I (1st compliance ("c"): Zn & TSS), Hg >12 5-12/2019 No Flow no flow 1/24/2020 1.36 7.5 230 <0.0002 <0.001 <0.05 <0.001 <0.001 0.0107 1 0.0233 0.00464 0.00839 <0.001 <0.001 <0.0002 0.052 28.9 Tier 11 (Cu - next >BM=Tier III), Tier I (TSS, 2nd c: Zn), Hg >12 02-05/2020 No Flow no flow 6/16/2020 1.89 7.6 560 <0.0002 0.00262 <0.05 <0.001 <0.001 0.0391 0.0288 0.0331 <0.001 <0.001 0.000436 0.335 24.7 Tier III (Cu), Tier II (TSS), Tier I (Zn), Hg >12 7-8/2020 No Flow no flow 9/17/2020 1.69 7.5 1 <0.0002 0.00120 1 <0.05 <0.001 <0.001 0.00946 �� I • 0.00813 0.00990 1 <0.001 <0.001 <0.0002 0.086 8.22 Tier III (Cu & TSS), Tier I (1st c: Zn) 10/2020 No Flow no flow 11/11/2020 0.39 7.6 71 <0.0002 <0.001 <0.05 <0.001 <0.001 0.00564 1 0 0.00369 0.00511 <0.001 <0.001 <0.0002 0.170 7.88 Tier III (Cu, 1st c: TSS), Tier I (Zn), next Zn>bm is Tier III 12/14/2020 1.16 8.0 <0.0002 0.00119 <0.05 <0.001 <0.001 0.0119 1 0.00669 0.00898 <0.001 <0.001 <0.0002 0.048 19.Oa g Tier ill (Cu, TSS), Tier I (1st c: Zn), next Zn>bm is Tier III, Hg>12 2/11/2021 0.45 7.3 100 <0.0002 <0.001 <0.05 <0.001 <0.001 0.00527 1 0.00278 0.00408 <0.001 <0.001 <0.0002 0.020 12.4 Tier III (Cu, 1st c: TSS), Tier I (2nd c: Zn), next Zn>bm is Tier III, Hg>1 3-12/2021 No Flow no flow 1-12/2022 No Flow no flow SU - standard units < - not detected at the following level SA - semi-annual mg/L - milligrams per liter NA - not applicable SA-QCA semi-annualor quarterly during during coal or ash transport ug/L - micrograms per liter NE - not established Disc - discontinued ng/L - nanograms per liter PCB - polychlorinated biphenyls ROS - representative outfall status Compliant no shading NFlow - no flow Tier Requirements for Benchmark Exceedances One exceedance of benchmark value - Inspection and evaluate causes within two weeks after receiving results and implement corrective actions within two months. Monthly sampling frequency of outfall until three (3) consecutive results are below benchm, Tier. I _ _value. Tier II Two consecutive exceedances of benchmark value - evaluate causes within two weeks and imnlement corrective actions within two months. Samnling conducted monthly until three Other Notes: Mercury above 12 ng/L must be reported on the DMR but does not activate a Tier response consecutive results are below benchmark value. Buck - Stormwater Outfall SW078 Monitoring ay �\ \A10�a`��eJe` \O�jyoti0 i4,�'y �4,�'L `yvp'L `y��0 o �o r r �ot� o oor or or or or Parameter ,�oQ� ��5 ,�o� Lo �e ,�.�` O` QL QL QL QL QL QL QL Comments / Notes Units inches SU mg/ L mg/L mg/L mg/L ng/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L to Yadkin R. Benchmark NA 1 6.0-9.01 100 0.010 0.056 0.126 NE 15 <-Detect-> Frequency* SA SA SA SA SA SA SA SA SA * monthly when in Tier status. Date 10/11/2018 2.96 7.2 25 1 0.0125 <0.001 0.0186 1 11.5 1 <4.5 1 <0.40 1 <0.40 1 <0.40 1 <0.40 1 <0.40 1 <0.40 1 <0.40 Tier I (Cu) 11-2018 No Flow 12/20/2018 1.61 8.4 1 74 0.0188 <0.001 0.0600 1 196 1 <4.4 1 <0.40 1 <0.40 1 <0.40 1 <0.40 1 <0.40 1 <0.40 1 <0.40 Tier 11 (Cu), Hg>12 1-12/2019 No Flow no flow during 2019 01-05/2020 No Flow no flow 6/20/2020 1.89 7.4 11 0.00396 1 <0.001- 0.009 3.87 <5.0 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 <0.40 Tier 11 (1st c: Cu) 7-12/2020 ®- No Flow no flow 1-12/2021 No Flow no flow 1-12/2022 No Flow no flow SU - standard units SA - semi-annual mg/L - milligrams per liter SA-QCA semi-annualor quarterly during during coal or ash transport ug/L - micrograms per liter Disc - discontinued ng/L - nanograms per liter ROS - representative outfall status Compliant no shading NFlow - no flow Tier Requirements for Benchmark Exceedances One exceedance of benchmark value - Inspection and evaluate causes within two weeks after receiving results and implement corrective actions within two months. Monthly sampling frequency of outfall until three Tier I (3) consecutive results are below benchmark value. Two consecutive exceedances of benchmark value - evaluate causes within two weeks and implement corrective actions within two months. Sampling conducted monthly until three (3) consecutive results are below Tier II benchmark value. Other Notes: Mercury above 12 ng/L must be reported on the DMR but does not activate a Tier response Buck - Stormwater Outfall SW079 Monitoring aye o``A1o�a`�\e"Je` 0 `Olt, tyoy� 'sy¢' NO r�o r�o r�o r�o �a��a• ��`�JyQ QQ��`` `e�`J� `\�� i��, � �e Pioc, P�oc. Pioc, P�oc, Pioc, Pioc P�oc, Parameter ,�o Q� ,�o Lo �e ,,.� �e O� QL� QL� QL� Q�� QL� QL� QL� Comments /Notes Units inches SU mg/L mg/L mg/L mg/L ng/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L to Yadkin R. Benchmark NA 6.0-9.0 100 1 0.010 0.056 0.126 NE 15 <-Detect-> Frequency SA SA SA SA SA SA SA SA SA Date 12/20/2018 1.61 1 7.5 1 40 0.0165 0.00271 0.198 216 1 <4.4 <0.40 <0.40 <0.40 1 <0.40 1 <0.40 <0.40 <0.40 Tier I (Cu, Zn) Hg>12 1-3/2019 no flow No flow 4/5/2019 0.98 1 7.6 1 190 0.0562 0.00409 0.237 46.2 1 <5.1 <0.40 <0.40 <0.40 1 <0.40 1 <0.40 <0.40 <0.40 Tier I (TSS), Tier II (Cu, Zn), Hg>12 5-12/2019 no flow No flow 1-12/2020 no flow No flow 1-12/2021 no flow No flow 1-12/2022 no flow No flow SU - standard units SA - semi-annual mg/L - milligrams per liter SA-QCA semi-annualor quarterly during during coal or ash transport ug/L - micrograms per liter Disc - discontinued ng/L - nanograms per liter ROS - representative outfall status Compliant no shading NFlow - no flow Tier Requirements for Benchmark Exceedances Tier I One exceedance of benchmark value - Inspection and evaluate causes within two weeks after receiving results and implement corrective actions within two months. Monthly sampling frequency of outfall until three (3) consecutive results are below benchmark value. Tiar 7i Two consecutive exceedances of benchmark value - evaluate causes within two weeks and implement corrective actions within two months. Sampling conducted monthly until three (3) consecutive results are Other Notes: Mercury above 12 ng/L must be reported on the DMR but does not activate a Tier response Buck - Stormwater Outfall SW080 Monitoring ay ea o'`a '�° \� o`er Nam \'�° '�°°� ♦ ��\ \� ti� titi titi titi titi titi titi ova\` �a� ��a \�° P�� a� a� `�\ �La\ �\`t G�\� � tea` �Jy� �Q4o •S� `J� '�`�� •`� �� Qom\ °�� •�� O� �\ C>ie i°° to° toc coc io° to° toy Parameter°��` �e�`` S�J�` Gaa� CrC.°��,�-,a�� .`�.°�� O�� Comments /Notes ��°tea\ Pt�e� Q�°ion �.°tea\ Po52�°� Q�Q'P QCQ'P QCQ'P QC�P QGQ'P QGQ'P QG�P Units inches SU Jmg/L mg/L I mg/L mg/L mg/L I mg/L I mg/L mg/L I mg/L I mg/L mg/L mg/L mg/L mg/L mg/L ug/L ug/L ug/L ug/L ug/L ug/L ug/L 12"CMP to Yadkin R. Benchmark NA 6.0-9.0 100 1 0.0003 0.34 1 NE 10.065 0.0031 0.9 0.010 10.33510.075 0.09 0.056 NE 0.126 15 <-Detect-> Frequency SA SA I SA I SA I SA I SA I SA I SA I SA I SA I SA I SA SA SA I SA SA SA SA Date 2H2O18 no qualifying flow no flow 1H2O19 no qualifying flow no flow 2H2O19 no qualifying flow no flow 1H2O20 no qualifying flow no flow 2H2O20 no qualifying flow no flow 1H2O21 no qualifying flow no flow 2H2O21 no qualifying flow no flow 1H2O22 no qualifying flow no flow 2H2O22 no qualifying flow no flow SU - standard units < - not detected at the following level SA - semi-annual mg/L - milligrams per liter NA - not applicable SA-QCA semi-annualor quarterly during during coal or ash transport ug/L - micrograms per liter NE - not established Disc - discontinued ng/L - nanograms per liter PCB - polychlorinated biphenyls ROS - representative outfall status Compliant no shading NFlow - no flow Tier Requirements for Benchmark Exceedances One exceedance of benchmark value - Inspection and evaluate causes within two weeks after receiving results and implement corrective actions within two months Tier I results are below benchmark value. Tier H Other Notes: Monthly sampling frequency of outfall until three (3) consecutive Txx/n rnnCPrlit; VP PYrPPilanrPc of k1 nrhmaA- VaI11P - PVaIitnfP rallcPc within ta1ln 11/PP1lC and ;Mn IPMPnt rnr f;kfP artlnnc xx)fthfn t\xin mnnthc QamnI;na rnnAii1 tPA monthIxi 11nt7I thrPP Mercury above 12 ng/L must be reported on the DMR but does not activate a Tier response consecutive results are below benchmark value. Buck - Stormwater Outfall SW081 Monitoring ay 5°`` a ♦ �a �a� a� a� ♦ °a •t,° ,.o �a� a� ` �o'` .�o'` ova .� p\ (o ti , 'L p� oti titi ,�'' tip` tip` by do ti ti �a`� e°aa°,�a �,�o a` Q,� a` \`� o\,�o°� �o�a \��'` o�a� yam` `otti `o{ti �� `' �� ,�` ,a •`O �` ¢5 a�� o o`er �`O� �� ' Pc Pt Pt Pt `,`' P; Pt Parameter `�`O c�a�Q .�ra� 1`�° Comments / Notes P�'`� QCQ' QCQ' QC�' QC�' QC�' QLQ' QCQ' Units inches SU mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L mg/L1 mg/L mg/L mg/L mg/L ug/L ug/L I ug/L I ug/L I ug/L ug/L I ug/L 12"CMP to Yadkin R. Benchmark NA 6.0-9.0 100 0.34 NE 0.065 0.003 0.9 0.010 0.335 0.075 0.09 0.056 NE 0.126 15 <-Detect-> Frequency SA SA SA �0�.0003 SA SA SA SA SA SA SA SA SA SA I SA SA I SA SA SA Date 2H2O18 no qualifying flow no flow 11-12O19 no qualifying flow no flow 2H2O19 no qualifying flow no flow 11-12O20 no qualifying flow no flow 21-12O20 no qualifying flow no flow 11-12O21 no qualifying flow no flow 21-12O21 no qualifying flow no flow 11-12O22 no qualifying flow no flow 2H2O22 no qualifying flow no flow SU - standard units < - not detected at the following level SA - semi-annual mg/L - milligrams per liter NA - not applicable SA-QCA semi-annualor quarterly during during coal or ash transport ug/L - micrograms per liter NE - not established Disc - discontinued ng/L - nanograms per liter PCB - polychlorinated biphenyls ROS - representative outfall status Compliant no shading NFlow - no flow Tier Requirements for Benchmark Exceedances One exceedance of benchmark value - Inspection and evaluate causes within two weeks after receiving results and implement corrective actions within two months Tier I benchmark value. Other Notes: Mercury above 12 ng/L must be reported on the DMR but does not activate a Tier response Monthly sampling frequency of outfall Lentil three (3) consecutive results are belo, until three (3) consecutive results are below benchmark value. Buck Station Stormwater Permit Renewal Application Attachment 6 Summary of Visual Monitoring DUKE ENE RGYo Facility Name: Buck Combined Cycle County: Rowan Site Contact: Dale Wooten Individual NPDES Permit No Phone Number: Outfall Number: (N Stantec NCS000554 704-630-3086 CTCC-001 Summary of Stormwater Discharge Outfall (SDO) Qualitative Monitoring Reports Date: Discharge Assessment Erosion / Deposition Total Event Precipitation (in) Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen 10/10/2018 Clear None 1 1 1 None None None 0.42 1/29/2019 Clear None 1 1 1 None None None 0.18 11/13/2019 Clear None 1 1 1 None None None 0.49 1/24/2020 Clear None 1 1 1 None None None 1.36 8/31/2020 Clear None 1 1 1 None None None 2.23 1/25/2021 Clear None 1 1 1 None None None 0.36 7/8/2021 Clear None 1 1 1 None None None 0.31 2/4/2022 Clear None 1 1 1 None None None 0.27 9/30/2022 Clear None 1 1 1 None None None 1.3 Notes: Value assessment of 1-5 for Clarity, Floating Solids and Suspended Solid. Values increasing upward by severity 1 = Best Case and 5 = Worst Case DUKE ENERGY. Facility Name: Suck Steam Station County: Rowan Site Contact: Dale Wooten (N Stantec Individual NPDES Permit No. NCS000578 Phone Number: 704-630-3086 Outfall Number: SW001 Summary of Stormwater Discharge Outfall (SDO) Qualitative Monitoring Reports Date: Discharge Assessment Erosion / Deposition Total Event Precipitation (in) Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen 10/11/2018 Light/clear None 1 1 1 None None None 2.92 11/2018 No qualifying flow for the month of November 12/20/2018 Clear None 1 1 1 None None None 1.61 1/29/2019 Clear None 3 2 2 None None None 0.18 2/12/2019 No flow 0.35 3/2019 No qualifying flow for the month of March 4/5/2019 Clear None 1 1 1 None None None 0.98 4/12/2019 Light brown None 2 1 2 None None None 0.52 5/2019 No qualifying flow for the month of May 6/2019 No qualifying flow for the month of June 7/2019 No qualifying flow for the month of July 8/2019 No qualifying flow for the month of August 9/2019 No qualifying flow for the month of September 10/2019 No qualifying flow for the month of October 11/12/2019 Med red/brown Med to strong chemical odor 3 1 1 None None None 0.49 12/23/2019 Light red None 3 1 1 None None None 0.57 1/24/2020 fled None 3 1 1 None None None 1,36 2/6/2020 Reddish brown None 4 1 1 None None None 3.75 3/3/2020 Clear None 1 1 1 None I None None 0.16 4/2020 No qualifying flow for the month of April Notes: Value assessment of 1-5 for Clarity, Floating Solids and Suspended Solid. Values increasing upward by severity 1 = Best Case and 5 = Worst Case DUKE ENERGY. Facility Name: Buck Steam Station County: Rowan Site Contact: Dale Wooten Individual NPDES Permit No. Phone Number: Outfall Number: (I Stantec NCS000578 704-630-3086 SW001 Summary of Stormwater Discharge Outfall (SDO) Qualitative Monitoring Reports Date: Discharge Assessment Erosion / Deposition Total Event Precipitation (in) Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen 5/19/2020 Cloudy white slight odor 2 1 1 SlightbubblesNone None 1.08 5/27/2020 Clear None 1 1 1 None None None 0.81 6/16/2020 Yellow/brown Strong odor 1 1 1 None None None 1.89 7/2020 No qualifying flow for the month of July 8/31/2020 Lt brown None 2 1 1 None None None 2.23 9/17/2020 Clear None 1 1 1 None None None 1.69 10/28/2020 Faint tan None 2 1 1 None None None 0.28 11/11/2020 Clear None 1 1 1 None None None 0.39 12/14/2020 Lt brown None 2 1 1 None None None 1.16 1/25/2021 No flow 0.36 2/11/2021 Slightly cloudy None 1 1 1 None None None 0.45 3/16/2021 Clear None 1 1 1 None None None 0.55 4/2021 No qualifying flow for the month of April 5/3/2021 Clear None 1 I 1 I 1 I None I None None 1.36 6/2021 No qualifying flow for the month of June 7/2021 No qualifying flow for the month of July 8/2021 No qualifying flow for the month of August 9/21/2021 Yellow tint None 1 1 1 1 1 1 None I None None 0.96 10/2021 No qualifying flow for the month of October 11/2021 No qualifying flow for the month of November 12/2021 No qualifying flow for the month of December Notes: Value assessment of 1-5 for Clarity, Floating Solids and Suspended Solid. Values increasing upward by severity 1 = Best Case and 5 = Worst Case DUKE ENERGY, Facility Name: Buck Steam Station County: Rowan Site Contact: Dale Wooten Individual NPDES Permit No Phone Number: Outfall Number: (N Stantec NCS000578 704-630-3086 SW001 Summary of Stormwater Discharge Outfall (SDO) Qualitative Monitoring Reports Date: Discharge Assessment Erosion / Deposition Total Event Precipitation (in) Color Odor Clarity Floating Suspended Solids I Solids Foam Oil Sheen 1/2022 No qualifying flow for the month of January 2/2022 No qualifying flow for the month of February 3/23/2021 Slight tan None 2 1 1 1 1 1 None I None None 0.44 4/2022 No qualifying flow for the month of April 5/23/2022 Clear None 2 1 1 1 1 1 None I None None 1.48 6/2022 No qualifying flow for the month of June 7/2022 No qualifying flow for the month of July 8/2022 No qualifying flow for the month of August 9/2022 No qualifying flow for the month of September 10/2022 No qualifying flow for the month of October 11/2022 No qualifying flow for the month of November 12/2022 No qualifying flow for the month of December Notes: Value assessment of 1-5 for Clarity, Floating Solids and Suspended Solid. Values increasing upward by severity 1 = Best Case and 5 = Worst Case KE DU ENERGY. Facility Name: Buck Steam Station County: Rowan Site Contact: Dale Wooten Individual NPDES Permit No. NCS000578 Phone Number: 704-630-3086 Outfall Number: SWO02 (3 Stantec Summary of Stormwater Discharge Outfall (SDO) Qualitative Monitoring Reports Date: Discharge Assessment Erosion /Deposition Total Event Precipitation (in) Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen 10/11/2018 Clear None 1 1 1 None None None 2.92 11/2018 No qualifying flow for the month of November 12/20/2018 Clear None 1 1 2 2 None None None 1.61 1/29/2019 Clear None 2 2 2 None None None 0.18 2/12/2019 No flow 0.35 3/2019 No qualifying flow for the month of March 4/5/2019 Clear None 1 1 1 1 1 None I None I None 0.98 5/2019 No qualifying flow for the month of May 6/2019 No qualifying flow for the month of June 7/2019 No qualifying flow for the month of July 8/2019 No qualifying flow for the month of August 9/2019 No qualifying flow for the month of September 10/2019 No qualifying flow for the month of October 11/12/2019 Clear None 1 1 1 None None None 0.49 12/23/2019 Clear None 1 1 1 None None None 0.57 1/24/2020 Clear None 1 1 1 None None None 1.36 2/6/202D Lt Reddish brown None 2 1 1 None None None 3.75 3/3/2020 Clear None 1 1 1 1 1 None I None I None 0.16 4/2020 No qualifying flow for the month of April 5/19/2020 Clear None 1 1 1 None None None 1.08 5/27/2020 Clear None 1 1 1 None None None 0.81 Notes: Value assessment of 1-5 for Clarity, Floating Solids and Suspended Solid. Values increasing upward by severity 1 = Best Case and 5 = Worst Case DUKE ENERGY. Facility Name: Buck Steam Station County: Rowan Site Contact: Dale Wooten Individual NPDES Permit No. NCS000578 Phone Number: 704-630-3086 Outfall Number: SWO02 (3 Stantec Summary of Stormwater Discharge Outfall (SDO) Qualitative Monitoring Reports Date: Discharge Assessment Erosion /Deposition Total Event Precipitation (in) Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen 6/16/2020 Clear None 1 1 1 None None None 1.89 7/2020 No qualifying flow for the month of July 8/31/2020 Clear None 1 1 1 None None None 2.23 9/17/2020 Clear None 1 1 1 None None None 1.69 10/28/2020 Clear None 2 1 1 None None None 0.28 11/11/2020 Clear None 1 2 1 None None None 0.39 12/14/2020 Slight tan None 2 1 1 None None None 1.16 1/25/2021 No flow 0.36 2/11/2021 Slightly cloudy None 1 1 1 None None None 0.45 3/16/2021 Clear None 1 1 1 None None None 0.55 4/2021 No qualifying flow for the month of April 5/3/2021 Clear None 1 1 1 1 1 None I None I None 1.36 6/2021 No qualifying flow for the month of June 7/2021 No qualifying flow for the month of July 8/2021 No qualifying flow for the month of August 9/21/2021 Clear None 1 1 1 1 1 None I None I None 0.96 10/2021 No qualifying flow for the month of October 11/2021 No qualifying flow for the month of November 12/2021 No qualifying flow for the month of December 1/2022 No qualifying flow for the month of January 2/2022 No qualifying flow for the month of February 3/23/2021 Clear None 2 1 1 1 1 None I None I None 0.44 Notes: Value assessment of 1-5 for Clarity, Floating Solids and Suspended Solid. Values increasing upward by severity 1 = Best Case and 5 = Worst Case DUKE ENERGY: Facility Name: Buck Steam Station County: Rowan Site Contact: Dale Wooten Individual NPDES Permit No. NCS000578 Phone Number: 704-630-3086 Outfall Number: SWO02 (3 Stantec Summary of Stormwater Discharge Outfall (SDO) Qualitative Monitoring Reports Date: Discharge Assessment Erosion / Deposition Total Event Precipitation (in) Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen 5/23/2022 Clear None 2 1 1 None None None 1.48 6/2022 No qualifying flow for the month of June 7/2022 No qualifying flow for the month of July 8/2022 No qualifying flow for the month of August 9/2022 No qualifying flow for the month of September 10/2022 No qualifying flow for the month of October 11/2022 No qualifying flow for the month of November 12/2022 No qualifying flow for the month of December Notes: Value assessment of 1-5 for Clarity, Floating Solids and Suspended Solid. Values increasing upward by severity 1 = Best Case and 5 = Worst Case DUKE ENERGY. Facility Name: Buck Stearn Station County: Rowan Site Contact: Dale Wooten Individual NPDES Permit No. NCS000578 Phone Number: 704-630-3086 Outfall Number: SWO03 (3 Stantec Summary of Stormwater Discharge Outfall (SDO) Qualitative Monitoring Reports Date: Discharge Assessment Erosion / Deposition Total Event Precipitation (in) Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen 10/11/2018 Light/slightly gray None 2 1 1 None None None 2.92 11/2018 No qualifying flow for the month of November 12/20/2018 Light brown None 3 3 2 None I None None 1.61 1/29/2019 No flow 0.18 2/12/2019 No flow 0.35 3/2019 No qualifying flow for the month of March 4/5/2019 Light brown None 3 3 1 2 1 None I None I None 0.98 5/2019 No qualifying flow for the month of May 6/2019 No qualifying flow for the month of June 7/2019 No qualifying flow for the month of July 8/2019 No qualifying flow for the month of August 9/2019 No qualifying flow for the month of September 10/2019 No qualifying flow for the month of October 11/12/2019 Pipe inaccessible due to rip rap covering the outfall 0.49 12/23/2019 No flow 0.57 1/20/2020 No flow 1.36 2/6/2020 No flow 3.75 3/3/2020 No flow 0.16 4/2020 No qualifying flow for the month of April 5/19/2020 No flow 1.08 7/2020 No qualifying flow for the month of July Notes: Value assessment of 1-5 for Clarity, Floating Solids and Suspended Solid. Values increasing upward by severity 1= Best Case and 5 = Worst Case ENERGY. Facility Name: Buck Steam Station County: Rowan Site Contact: Dale Wooten Individual NPDES Permit No. NCS000578 Phone Number: 704-630-3086 Outfall Number: SWO03 (3 Stantec Summary of Stormwater Discharge Outfall (SDO) Qualitative Monitoring Reports Date: Discharge Assessment Erosion / Deposition Total Event Precipitation (in) Color Odor Floating Clarity Solids Suspended I Solids Foam Oil Sheen 8/2020 No qualifying flow for the month of August 9/17/2020 No flow 1.69 11/20/20 No flow - outfall is blocked up 12/14/2020 No flow - pipe is blocked 1.16 1/25/2021 No flow - pipe is blocked 0.36 2/11/2021 No flow - pipe is blocked 0.45 3/16/2021 No flow - pipe is blocked 0.55 4/2021 No qualifying flow for the month of April 5/3/2021 No flow - pipe is blocked 1.36 6/2021 No qualifying flow for the month of June 7/2021 No qualifying flow for the month of July 8/2021 No qualifying flow for the month of August 9/21/2021 No flow - pipe is blocked 0.96 10/2021 No qualifying flow for the month of October 11/2021 No qualifying flow for the month of November 12/2021 No qualifying flow for the month of December 1/2022 No qualifying flow for the month of January 2/2022 No qualifying flow for the month of February 3/23/2021 No flow- pipe is blocked 0.44 4/2022 No qualifying flow for the month of April 5/23/2022 No flow - pipe is blocked 1.48 6/2022 No qualifying flow for the month of June Notes: Value assessment of 1-5 for Clarity, Floating Solids and Suspended Solid. Values increasing upward by severity 1 = Best Case and 5 = Worst Case f� DUKE ENERGY. Facility Name: Buck Steam Station County: Rowan Site Contact., Dale Wooten Individual NPDES Permit No. NCS000578 Phone Number: 704-630-3086 Outfall Number: SWO03 (N Stantec Summary of Stormwater Discharge Outfall (SDO) Qualitative Monitoring Reports Date: Discharge Assessment Erosion / Deposition Total Event Precipitation (in) Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen 7/2022 No qualifying flow for the month of July 8/2022 No qualifying flow for the month of August 9/2022 No qualifying flow for the month of September 10/2022 No qualifying flow for the month of October 11/2022 No qualifying flow for the month of November 12/2022 No qualifying flow for the month of December Notes: Value assessment of 1-5 for Clarity, Floating Solids and Suspended Solid. Values increasing upward by severity 1 = Best Case and 5 = Worst Case (� DUKE ENERGY. Facility Name: Buck Steam Station County: Rowan Site Contact: Dale Wooten Individual NPDES Permit No. NCS000578 Phone Number: 704-630-3086 Outfall Number: SW048 (3 Stantec Summary of Stormwater Discharge Outfall (SDO) Qualitative Monitoring Reports Date: Discharge Assessment Erosion / Deposition Total Event Precipitation (in) Color Odor Floating Clarity Solids Suspended Solids Foam Oil Sheen 12/20/2018 No flow from the outfall during rain event 1.61 1/29/2019 No flow 0.18 2/12/2019 No flow 0.35 3/2019 No qualifying flow for the first quarter 2019 6/2019 No qualifying flow for the second quarter 2019 9/2019 No qualifying flow for the third quarter 2019 11/12/2019 No flow 0.49 12/23/2019 No flow 0.57 2/6/2020 No flow 3.75 4/2020 No qualifying flow for the month of April 5/19/2020 Cloudy white None 2 1 1 None None None 1.08 6/16/2020 Brown None 3 1 1 None None None 1.89 7/2020 No qualifying flow for the month of July 8/2020 No qualifying flow for the month of August 9/17/2020 Clear None 1 1 1 None None None 1.69 11/11/2020 No flow 0.39 12/14/2020 No flow 1.16 1/25/2021 No flow 0.36 2/11/2021 No flow 0.45 3/16/2021 No flow 0.55 4/2021 No qualifying flow for the month of April Notes: Value assessment of 1-5 for Clarity, Floating Solids and Suspended Solid. Values increasing upward by severity 1= Best Case and 5 = Worst Case ENEGY Facility Name: Buck Steam Station County: Rowan Site Contact: Dale Wooten Individual NPDES Permit No. NCS000578 Phone Number: 704-630-3086 Outfall Number: SW048 (3 Stantec Summary of Stormwater Discharge Outfall (SDO) Qualitative Monitoring Reports Date: Discharge Assessment Erosion / Deposition Total Event Precipitation (in) Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen 5/3/2021 No flow 1.36 6/2021 No qualifying flow for the month of June 7/2021 No qualifying flow for the month of July 8/2021 No qualifying flow for the month of August 9/2021 No qualifying flow for the month of September 10/2021 No qualifying flow for the month of October 11/2021 No qualifying flow for the month of November 12/2021 No qualifying flow for the month of December 1/2022 No qualifying flow for the month of January 2/2022 No qualifying flow for the month of February 3/2022 No qualifying flow for the month of March 4/2022 No qualifying flow for the month of April 5/23/2022 No qualifying flow for the month of May 6/2022 No qualifying flow for the month of June 7/2022 No qualifying flow for the month of July 8/2022 No qualifying flow for the month of August 9/2022 No qualifying flow for the month of September 10/2022 No qualifying flow for the month of October 11/2022 No qualifying flow for the month of November 12/2022 No qualifying flow for the month of December Notes: Value assessment of 1-5 for Clarity, Floating Solids and Suspended Solid. Values increasing upward by severity 1 = Best Case and 5 = Worst Case DUKE ENERGY. Facility Name: Buck Steam Station County: Rowan Site Contact: Dale Wooten Individual NPDES Permit No. NCS000578 Phone Number: 704-630-3086 Outfall Number: SWO56 (3 Stantec Summary of Stormwater Discharge Out€all (SDO) Qualitative Monitoring Reports Date: Discharge Assessment Erosion /Deposition Total Event Precipitation (in) Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen 12/20/2018 No flow from the outfall during rain event 1.61 1/29/2019 No flow 0.18 2/12/2019 No flow 0.35 3/2019 No qualifying flow for the first quarter 2019 6/2019 No qualifying flow for the second quarter 2019 9/2019 No qualifying flow for the third quarter 2019 11/12/2019 No flow 0.49 12/23/2019 No flow 0.57 2/6/2020 No flow 3.75 4/2020 No qualifying flow for the month of April 5/19/2020 No flow 1.08 7/2020 No qualifying flow for the month of July 8/2020 No qualifying flow for the month of August 9/17/2020 No flow 1.69 11/11/2020 No flow 0.39 12/14/2020 No qualifying flow for the month December 1/25/2021 No flow 0.36 2/11/2021 No flow 0.45 3/16/2021 No flow 0.55 4/2021 No qualifying flow for the month of April 5/3/2021 No qualifying flow for the month of May 6/2021 No qualifying flow for the month of June Notes: Value assessment of 1-5 for Clarity, Floating Solids and Suspended Solid. Values increasing upward by severity 1 = Best Case and 5 = Worst Case ENERGY. Facility Name: Buck Steam Station County: Rowan Site Contact: Dale Wooten Individual NPDES Permit No. NCS000578 Phone Number: 704-630-3086 Outfall Number: SWO56 (3 Stantec Summary of Stormwater Discharge Outfall (SDO) Qualitative Monitoring Reports Date: Discharge Assessment Erosion /Deposition Total Event Precipitation (in) Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen 7/2021 No qualifying flow for the month of July 8/2021 No qualifying flow for the month of August 9/2021 No qualifying flow for the month of September 10/2021 No qualifying flow for the month of October 11/2021 No qualifying flow for the month of November 12/2021 No qualifying flow for the month of December 1/2022 No qualifying flow for the month of January 2/2022 No qualifying flow for the month of February 3/2022 No qualifying flow for the month of March 4/2022 No qualifying flow for the month of April 5/23/2022 No qualifying flow for the month of May 6/2022 No qualifying flow for the month of June 7/2022 No qualifying flow for the month of July 8/2022 No qualifying flow for the month of August 9/2022 No qualifying flow for the month of September 10/2022 No qualifying flow for the month of October 11/2022 No qualifying flow for the month of November 12/2022 No qualifying flow for the month of December Notes: Value assessment of 1-5 for Clarity, Floating Solids and Suspended Solid. Values increasing upward by severity 1 T Best Case and 5 = Worst Case <t5 DUKE ENERGY. Facility Name: Buck Steam Station County. Rowan Site Contact: Dale Wooten Individual NPDES Permit No. NCS000578 Phone Number: 704-630-3086 Outfall Number: SW073 (3 Stantec Summary of Stormwater Discharge Outfall (SDO) Qualitative Monitoring Reports Date: Discharge Assessment Erosion / Deposition Total Event Precipitation (in) Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen 10/11/2018 Orange/brown None 5 4 1 5 None None None 2.92 11/2018 No qualifying flow for the month of November 12/20/2018 Light brown None 3 2 2 None None None 1.61 1/29/2019 Clear None 2 2 1 None None None 0.18 2/12/2019 Light brown None 3 1 2 None None None 0.35 3/2019 No qualifying flow for the month of March 4/5/2019 Light brown None 2 2 1 1 None None None 0.98 4/12/2019 Brown/orange None 4 1 1 3 None None None 0.52 5/2019 No qualifying flow for the month of May 6/2019 No qualifying flow for the month of June 7/2019 No qualifying flow for the month of July 8/2019 No qualifying flow for the month of August 9/2019 No qualifying flow for the month of September 10/2019 No qualifying flow for the month of October 11/12/2019 No flow 0.49 12/23/2019 Light red None 3 1 2 None None None 0.57 1/24/2020 Reddish -brown None 4 1 1 None None None 1.36 2/6/2020 Reddish brown None 3 1 1 None None None 3.75 3/3/2020 No flow 0.16 4/2020 No qualifying flow for the month of April 5/19/2020 Cloudy white None 2 1 1 1 None I None None 1.08 5/27/2020 No flow 0.81 Notes: Value assessment of 1-5 for Clarity, Floating Solids and Suspended Solid. Values increasing upward by severity 1 = Best Case and 5 = Worst Case KE DU ENERGY. Facility Name: Buck Steam Station County: Rowan Site Contact: Dale Wooten Individual NPDES Permit No. NCS000578 Phone Number: 704-630-3086 Outfall Number: SW073 (3 Stantec Summary of Stormwater Discharge Outfall (SDO) Qualitative Monitoring Reports Date: Discharge Assessment Erosion / Deposition Total Event Precipitation (in) Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen 6/16/2020 Reddish brown None 1ity 1 1 1 None None None 1.89 7/2020 No qualifying flow for the month of July 8/2020 No qualifying flow for the month of August 9/17/2020 Reddish brown None 4 1 1 1 None None None 1.69 11/11/2020 No flow 0.39 12/14/2020 Light brown None 3 2 1 1 None None None 1.16 1/25/2021 No flow 0.36 2/11/2021 No flow 0.45 3/16/2021 No flow 0.55 4/2021 No qualifying flow for the month of April 5/3/2021 No flow 1.36 6/2021 No qualifying flow for the month of June 7/2021 No qualifying flow for the month of July 8/2021 No qualifying flow for the month of August 9/2021 No qualifying flow for the month of September 10/2021 No qualifying flow for the month of October 11/2021 No qualifying flow for the month of November 12/2021 No qualifying flow for the month of December 1/2022 No qualifying flow for the month of January 2/2022 No qualifying flow for the month of February 3/2022 No qualifying flow for the month of March 4/2022 No qualifying flow for the month of April Notes: Value assessment of 1-5 for Clarity, Floating Solids and Suspended Solid. Values increasing upward by severity 1 = Best Case and 5 = Worst Case (� DUKE ENERGY. Facility Name: Buck Steam Station County: Rowan Site Contact: Dale Wooten Individual NPDES Permit No. NCS000578 Phone Number: 704-630-3086 Outfall Number: SW073 (3 Stantec Summary of Stormwater Discharge Outfall (SDO) Qualitative Monitoring Reports Date: Discharge Assessment Erosion / Deposition Total Event Precipitation (in) Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen 5/23/2022 No qualifying flow for the month of May 6/2022 No qualifying flow for the month of June 7/2022 No qualifying flow for the month of July 8/2022 No qualifying flow for the month of August 9/2022 No qualifying flow for the month of September 10/2022 No qualifying flow for the month of October 11/2022 No qualifying flow for the month of November 12/2022 No qualifying flow for the month of December Notes: Value assessment of 1-5 for Clarity, Floating Solids and Suspended Solid. Values increasing upward by severity 1 = Best Case and 5 = Worst Case ENERGY., Facility Name: Buck Steam Station County: Rowan Site Contact: Dale Wooten Individual NPDES Permit No. NCS000578 Phone Number: 704-630-3086 Outfall Number: SW075 (3 Stantec Summary of 5tormwater Discharge Outfall (SDO) Qualitative Monitoring Reports Date: Discharge Assessment Erosion / Deposition Total Event Precipitation (in) Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen 10/11/2018 Dark Brown None 5 4 5 None None None 2.92 11/2018 No qualifying flow for the month of November 12/20/2018 Light grey None 2 1 1 None None None 1.61 1/29/2019 Clear None 2 2 2 None None None 0.18 2/12/2019 Clear None 1 1 1 None None None 0.35 3/2019 No qualifying flow for the month of March 4/5/2019 Light brown None 2 1 1 None None None 0.98 4/12/2019 Brown/orange None 5 1 3 None None None 0.52 5/2019 No qualifying flow for the month of May 6/2019 No qualifying flow for the month of June 7/2019 No qualifying flow for the month of July 8/2019 No qualifying flow for the month of August 9/2019 No qualifying flow for the month of September 10/2019 No qualifying flow for the month of October 11/12/2019 Clear None 1 1 1 None None None 0.49 12/23/2019 Med red/brown None 4 1 2 None None None 0.57 1/24/2020 Reddish -brown None 4 1 1 None None None 1.36 2/6/2020 Reddish brown None 3 1 1 None None None 3.75 3/3/2020 Clear None 1 1 1 None I None None 0.16 4/2020 No qualifying flow for the month of April 5/19/2020 Cloudy white None 3 1 2 None None None 1.08 5/27/2020 Clear None 1 1 1 None None None 0.81 Notes: Value assessment of 1-5 for Clarity, Floating Solids and Suspended Solid. Values increasing upward by severity 1 = Best Case and 5 = Worst Case ENERGY. Facility Name: Buck Steam Station County: Rowan Site Contact: Dale Wooten Individual NPDES Permit No. NCS000578 Phone Number: 704-630-3086 Outfall Number: SW075 (3 Stantec Summary of Stormwater Discharge Outfall (SDO) Qualitative Monitoring Reports Date: Discharge Assessment Erosion / Deposition Total Event Precipitation (in) Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen 6/16/2020 Reddish brown None 3 1 1 None None None 1.89 7/2020 No qualifying flow for the month of July 9/31/2020 Lt brown None 3 1 1 None None None 2.23 9/17/2020 Clear None 1 1 1 None None None 1.69 10/28/2020 Clear None 2 1 1 None None None 0.28 11/11/2020 Light red None 2 1 1 None None None 0.39 12/14/2020 Light brown None 3 1 1 None None None 1.16 1/25/2021 Clear None 1 1 1 None None None 0.36 2/11/2021 Clear None 1 1 1 None None None 0.45 3/16/2021 Tan None 2 1 1 None None None 0.55 4/2021 No qualifying flow for the month of April 5/3/2021 Tan None 2 1 1 1 1 None I None I None 1.36 6/2021 No qualifying flow for the month of June 7/2021 No qualifying flow for the month of July 8/2021 No qualifying flow for the month of August 9/21/2021 Clear None 1 1 1 1 1 None I None I None 0.96 10/2021 No qualifying flow for the month of October 11/2021 No qualifying flow for the month of November 12/2021 No qualifying flow for the month of December 1/2022 No qualifying flow for the month of January 2/23/2022 Clear None 2 1 1 None None None 0.27 3/23/2021 Clear None 2 1 1 1 None None None 0.44 Notes: Value assessment of 1-5 for Clarity, Floating Solids and Suspended Solid. Values increasing upward by severity 1 = Best Case and 5 = Worst Case ENERGY. Facility Name: Buck Steam Station County: Rowan Site Contact: Dale Wooten Individual NPDES Permit No. NCS000578 Phone Number: 704-630-3086 Outfall Number: SW075 (3 Stantec Summary of Stormwater Discharge Outfall (SDO) Qualitative Monitoring Reports Date: Discharge Assessment Erosion / Deposition Total Event Precipitation (in) Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen 4/2022 No qualifying flow for the month of April 5/23/2022 Muddy It brown 4 3 1 1 1 1 None I None None 1.48 6/2022 No qualifying flow for the month of June 7/2022 No qualifying flow for the month of July 8/2022 No qualifying flow for the month of August 9/30/2022 Clear None 1 1 1 1 1 None I None I None 1.3 10/2022 No qualifying flow for the month of October 11/2022 No qualifying flow for the month of November 12/2022 Clear None 1 1 1 1 1 None I None I None 0.49 Notes: Value assessment of 1-5 for Clarity, Floating Solids and Suspended Solid. Values increasing upward by severity 1 = Best Case and 5 = Worst Case DUKE ENERGY. Facility Name: Buck Steam Station County: Rowan Site Contact: Dale Wooten Individual NPDES Permit No. NCS000578 Phone Number: 704-630-3086 Outfall Number: SW077 (3 Stantec Summary of Stormwater Discharge Outfall {SDO} Qualitative Monitoring Reports Date: Discharge Assessment Erosion / Deposition Total Event Precipitation (in) Color odor Clarity Floating Solids Suspended Solids Foam Oil Sheen 10/26/2018 Medium brown None 3 1 2 None I None None 1.98 11/2018 No qualifying flow for the month of November 12/20/2018 Medium brown Slight odor 4 2 3 None None None 1.61 1/29/2019 Clear None 3 2 2 Yes None None 0.18 2/12/2019 Clear None 1 1 2 None None None 0.35 3/2019 No qualifying flow for the month of March 4/5/2019 Clear None 1 1 1 1 1 None I None None 0.98 5/2019 No qualifying flow for the month of May 6/2019 No qualifying flow for the month of June 7/2019 No qualifying flow for the month of July 8/2019 No qualifying flow for the month of August 9/2019 No qualifying flow for the month of September 10/2019 No qualifying flow for the month of October 11/12/2019 No flow 0.49 12/23/2019 Med red/brown None 4 1 2 None None None 0.57 1/24/2020 park Reddish- brown None 5 1 1 None None None 1.36 2/6/2020 Reddish brown None 4 1 1 None None None 3.75 3/3/2020 No flow 0.16 4/2020 No qualifying flow for the month of April 5/19/2020 Reddish brown None 3 1 1 3 1 None I None None 1.08 Notes: Value assessment of 1-5 for Clarity, Floating Solids and Suspended Solid. Values increasing upward by severity 1 = Best Case and 5 = Worst Case DUKE ENERGY. Facility Name: Buck Steam Station County: Rowan Site Contact: Dale Wooten Individual NPDES Permit No. NCS000578 Phone Number: 704-630-3086 Outfall Number: SW077 (3 Stantec Summary of Stormwater Discharge Outfall (SDO) Qualitative Monitoring Reports Date. Discharge Assessment Erosion / Deposition Total Event Precipitation (in) Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen 5/27/2020 No flow 0.81 6/16/2020 Reddish brown None 5 1 1 None None None 1.89 7/2020 No qualifying flow for the month of July 8/2020 No qualifying flow for the month of August 9/17/2020 Reddish brown None 4 1 1 None None None 1.69 11/11/2020 Reddish brown None 3 1 1 None None None 0.39 12/14/2020 Light brown None 3 1 1 None None None 1.16 1/25/2021 No flow 0.36 2/11/2021 Light brown None 3 1 1 1 None I None None 0.45 3/16/2021 No flow 0.55 4/2021 No qualifying flow for the month of April 5/3/2021 No flow 1.36 6/2021 No qualifying flow for the month of June 7/2021 No qualifying flow for the month of July 8/2021 No qualifying flow for the month of August 9/2021 No qualifying flow for the month of September 10/2021 No qualifying flow for the month of October 11/2021 No qualifying flow for the month of November 12/2021 No qualifying flow for the month of December 1/2022 No qualifying flow for the month of January 2/2022 No qualifying flow for the month of February 3/2022 No qualifying flow for the month of March Notes: Value assessment of 1-5 for Clarity, Floating Solids and Suspended Solid. Values increasing upward by severity 1 = Best Case and 5 = Worst Case KE DU ENERGY. Facility Name: Buck Steam Station County: Rowan Site Contact: Dale Wooten Individual NPDES Permit No. NCS000578 Phone Number: 704-630-3086 Outfall Number: SW077 (3 Stantec Summary of Stormwater Discharge Outfall (SDO) Qualitative Monitoring Reports Date: Discharge Assessment Erosion / Deposition Total Event Precipitation (in) Color Odor Clarity Floating Solids Suspended I Solids Foam Oil Sheen 4/2022 No qualifying flow for the month of April 5/23/2022 Slightly muddy, It brown None 3 1 2 None None None 1.48 6/2022 No qualifying flow for the month of June 7/2022 No qualifying flow for the month of July 8/2022 No qualifying flow for the month of August 9/2022 No qualifying flow for the month of September 10/2022 No qualifying flow for the month of October 11/2022 No qualifying flow for the month of November 12/2022 No qualifying flow for the month of December Notes: Value assessment of 1-5 for Clarity, Floating Solids and Suspended Solid. Values increasing upward by severity 1 = Best Case and 5 = Worst Case DUKE ENERGY, Facility Name: Buck Steam Station County: Rowan Site Contact: Dale Wooten Individual NPDES Permit No. NCS000578 Phone Number: 704-630-3086 Outfall Number: SW078 (3 Stantec Summary of Stormwater Discharge Outfall (SDO) Qualitative Monitoring Reports Date. Discharge Assessment Erosion / Deposition Total Event Precipitation (in) Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen 10/11/2018 Lt. grayish None 2 1 1 None None None 2.92 11/2018 No qualifying flow for the month of November 12/20/2018 Light brown None 2 1 1 2 None I None None 1.61 1/29/2019 No flow 0.18 2/12/2019 No flow 0.35 3/2019 No qualifying flow for the month of March 4/2019 No qualifying flow for the month of April 5/2019 No qualifying flow for the month of May 6/2019 No qualifying flow for the month of June 7/2019 No qualifying flow for the month of July 8/2019 No qualifying flow for the month of August 9/2019 No qualifying flow for the month of September 10/2019 No qualifying flow for the month of October 11/12/2019 No flow 0.49 12/23/2019 Light red/brown None 3 1 1 None None None 0.57 1/20/2020 No flow 1.36 2/6/2020 Lt Reddish brown None 3 1 1 None None None 3.75 3/3/2020 No flow 0.16 4/2020 No qualifying flow for the month of April 5/19/2020 No flow 1.08 Notes: Value assessment of 1-5 for Clarity, Floating Solids and Suspended Solid. Values increasing upward by severity 1 = Best Case and 5 = Worst Case KE DU ENERGY. Facility Name: Buck Steam Station County: Rowan Site Contact: Dale Wooten Individual NPDES Permit No. NCS000578 Phone Number: 704-630-3086 Outfall Number: SW078 (3 Stantec Summary of Stormwater Discharge Outfall (SDO) Qualitative Monitoring Reports Date: Discharge Assessment Erosion / Deposition Total Event Precipitation (in) Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen 5/27/2020 No flow 0.81 6/16/2020 Clear None 5 1 1 1 None None None 1.89 7/2020 No qualifying flow for the month of July 8/2020 No qualifying flow for the month of August 9/17/2020 No flow 1.69 11/11/2020 No flow 0.39 12/14/2020 No flow 1.16 1/25/2021 No flow 0.36 2/11/2021 No flow 0.45 3/16/2021 No flow 0.55 4/2021 No qualifying flow for the month of April 5/3/2021 No flow 1.36 6/2021 No qualifying flow for the month of June 7/2021 No qualifying flow for the month of July 8/2021 No qualifying flow for the month of August 9/2021 No qualifying flow for the month of September 10/2021 No qualifying flow for the month of October 11/2021 No qualifying flow for the month of November 12/2021 No qualifying flow for the month of December 1/2022 No qualifying flow for the month of January 2/2022 No qualifying flow for the month of February 3/2022 No qualifying flow for the month of March Notes: Value assessment of 1-5 for Clarity, Floating Solids and Suspended Solid. Values increasing upward by severity 1 = Best Case and 5 = Worst Case Facility Name: Buck Steam Station County: Rowan Site Contact: Dale Wooten Individual NPDES Permit No. NCS000578 Phone Number: 704-630-3086 Outfall Number: SW078 (3 Stantec Summary of Stormwater Discharge Outfall (SDO) Qualitative Monitoring Reports Date: Discharge Assessment Erosion / on Deposition Total Event Precipitation (in) Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen 4/2022 No qualifying flow for the month of April 5/23/2022 No qualifying flow for the month of May 6/2022 No qualifying flow for the month of June 7/2022 No qualifying flow for the month of July 8/2022 No qualifying flow for the month of August 9/2022 No qualifying flow for the month of September 10/2022 No qualifying flow for the month of October 11/2022 No qualifying flow for the month of November 12/2022 No qualifying flow for the month of December Notes: Value assessment of 1-5 for Clarity, Floating Solids and Suspended Solid. Values increasing upward by severity 1= Best Case and S = Worst Case (� DUKE ENERGY Facility Name: Buck Stearn Station County: Rowan Site Contact: Dale Wooten Individual NPDES Permit No. NCS000578 Phone Number: 704-630-3086 Outfall Number: SW079 (3 Stantec Summary of Stormwater Discharge Outfall (SDO) Qualitative Monitoring Reports Date: Discharge Assessment Erosion / Deposition Total Event Precipitation (in) Color Odor Clarity Floating Solids I Suspended Solids Foam Oil Sheen 11/2018 No qualifying flow for the month of November 1/29/2019 No flow 0.18 2/12/2019 No flow 0.35 3/2019 No qualifying flow for the month of March 4/5/2019 Light grey None 2 i 1 None None None 0.98 5/2019 No qualifying flow for the month of May 6/2019 No qualifying flow for the month of June 7/2019 No qualifying flow for the month of July 9/2019 No qualifying flow for the month of August 9/2019 1 No qualifying flow for the month of September 10/2019 No qualifying flow for the month of October 11/12/2019 No flow 0.49 12/23/2019 Light red/brown None 2 1 1 None None None 0.57 1/20/2020 No flow 1.36 2/6/2020 Clear None 1 1 1 None I None None 3.75 3/3/2020 No flow 0.16 4/2020 No qualifying flow for the month of April 5/19/2020 No flow 1.08 5/27/2020 No flow 0.81 7/2020 No qualifying flaw for the month of July 8/2020 No qualifying flow for the month of August Notes: Value assessment of 1-5 for Clarity, Floating Solids and Suspended Solid. Values increasing upward by severity 1 = Best Case and 5 = Worst Case (� DUKE ENERGY. Facility Name: Buck Steam Station County: Rowan Site Contact: Dale Wooten Individual NPDES Permit No. NCS000578 Phone Number: 704-630-3086 Outfall Number: SW079 (3 Stantec Summary of Stormwater Discharge Outfall (SDO) Qualitative Monitoring Reports Date: Discharge Assessment Erosion / Deposition Total Event Precipitation (in) Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen 9/17/2020 No flow 1.69 10/2020 No qualifying flow for the month of October 11/2020 No qualifying flow for the month of November 12/14/20201 No flow 1.16 1/25/2021 No flow 0.36 2/11/2021 No flow 0.45 3/16/2021 No flow 0.55 4/2021 No qualifying flow for the month of April 5/3/2021 No flow 1.36 6/2021 No qualifying flow for the month of June 7/2021 No qualifying flow for the month of July 8/2021 No qualifying flow for the month of August 9/2021 No qualifying flow for the month of September 10/2021 No qualifying flow for the month of October 11/2021 No qualifying flow for the month of November 12/2021 No qualifying flow for the month of December 1/2022 No qualifying flow for the month of January 2/2022 No qualifying flow for the month of February 3/2022 No qualifying flow for the month of March 22 No qualifying flow for the month of April 2022 t6/2O22 No qualifying flow for the month of May No qualifying flow for the month of June Notes: Value assessment of 1-5 for Clarity, Floating Solids and Suspended Solid. Values increasing upward by severity 1 = Best Case and 5 = Worst Case ENERGY. Facility Name: Buck Steam Station County: Rowan Site Contact: Dale Wooten Individual NPDES Permit No. NCS000578 Phone Number: 704-630-3086 Outfall Number: SW079 (3 Stantec Summary of Stormwater Discharge Outfall (SDO) Qualitative Monitoring Reports Date: Discharge Assessment Erosion / Deposition Total Event Precipitation (in) Color Odor Clarity Floating Solids Suspended Foam Solids Oil Sheen 7/2022 No qualifying flow for the month of July 8/2022 No qualifying flow for the month of August 9/2022 No qualifying flow for the month of September 10/2022 No qualifying flow for the month of October 11/2022 No qualifying flow for the month of November 12/2022 No qualifying flow for the month of December Notes: Value assessment of 1-5 for Clarity, Floating Solids and Suspended Solid. Values increasing upward by severity 1 = Best Case and 5 = Worst Case %DUKE ENERGY. Facility Name: Buck Steam Station County: Rowan Site Contact: Dale Wooten Individual NPDES Permit No. NCS000578 Phone Number: 704-630-3086 Outfall Number: SWO80 (3 Stantec Summary of Stormwater Discharge Outfall (SDO) Qualitative Monitoring Reports Date: Discharge Assessment Erosion / Deposition Total Event Precipitation (in) Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen 3/2019 No qualifying flow for the first quarter 2019 6/2019 No qualifying flow for the second quarter 2019 9/2019 No qualifying flow for the third quarter 2019 4/2020 No qualifying flow for the month of April 5/19/2020 No flow 1.08 7/2020 No qualifying flow for the month of July 8/2020 No qualifying flow for the month of August 9/17/2020 No flow 1.69 12/2020 No qualifying flow for the month December 1/2021 No qualifying flow for the month of January 2/2021 No qualifying flow for the month of February 3/2021 No qualifying flow for the month of March 4/2021 No qualifying flow for the month of April 5/3/2021 No qualifying flow for the month of May 6/2021 No qualifying flow for the month of June 7/2021 No qualifying flow for the month of July 8/2021 No qualifying flow for the month of August 9/2021 No qualifying flow for the month of September 10/2021 No qualifying flow for the month of October 1112021 No qualifying flow for the month of November 12/2021 No qualifying flow for the month of December 1/2022 No qualifying flow for the month of January Notes: Value assessment of 1-5 for Clarity, Floating Solids and Suspended Solid. Values increasing upward by severity 1 = Best Case and 5 = Worst Case (� DUKE ENERGY. Facility Name: Buck Steam Station County: Rowan Site Contact: Dale Wooten Individual NPDES Permit No. NCS000578 Phone Number: 704-630-3086 Outfall Number: SWO80 (3 Stantec Summary of Stormwater Discharge Outfall (SDO) Qualitative Monitoring Reports Date: Discharge Assessment Erosion / Deposition Total Event Precipitation (in) Color Odor Clarity Floating Suspended Solids Solids Foam Oil Sheen 2/2022 No qualifying flow for the month of February 3/2022 No qualifying flaw for the month of March 4/2022 No qualifying flow for the month of April 5/23/2022 No qualifying flow for the month of May 6/2022 No qualifying flow for the month of June 7/2022 No qualifying flow for the month of July 8/2022 No qualifying flow for the month of August 9/2022 No qualifying flow for the month of September 10/2022 No qualifying flow for the month of October 11/2022 No qualifying flow for the month of November 12/2022 No qualifying flow for the month of December Notes: Value assessment of 1-5 for Clarity, Floating Solids and Suspended Solid. Values increasing upward by severity 1 = Best Case and 5 = Worst Case ENERGY. Facility Name: Buck Steam Station County: Rowan Site Contact: Dale Wooten Individual NPDES Permit No. NCS000578 Phone Number: 704-630-3086 Outfall Number: SWO81 (3 Stantec Summary of Stormwater Discharge Out#all (SDO) Qualitative Monitoring Reports Date: Discharge Assessment Erosion / Deposition Total Event Precipitation (in) Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen 3/2019 No qualifying flow for the first quarter 2019 6/2019 No qualifying flow for the second quarter 2019 9/2019 No qualifying flow for the third quarter 2019 4/2020 No qualifying flow for the month of April S/19/2020 No flow 1.08 7/2020 No qualifying flow for the month of July 8/2020 No qualifying flow for the month of August 9/17/2020 No flow 1.69 12/2020 No qualifying flow for the month December 1/2021 No qualifying flow for the month of January 2/2021 No qualifying flow for the month of February 3/2021 No qualifying flow for the month of March 4/2021 No qualifying flow for the month of April 5/3/2021 No qualifying flow for the month of May 6/2021 No qualifying flow for the month of June 7/2021 No qualifying flow for the month of July 8/2021 No qualifying flow for the month of August 9/2021 No qualifying flow for the month of September 10/2021 No qualifying flow for the month of October 1112021 No qualifying flow for the month of November 12/2021 No qualifying flow for the month of December 1/2022 No qualifying flow for the month of January Notes: Value assessment of 1-5 for Clarity, Floating Solids and Suspended Solid. Values increasing upward by severity 1 = Best Case and 5 = Worst Case DUKE ENERGY. Facility Name: Buck Steam Station County: Rowan Site Contact: Dale Wooten Individual NPDES Permit No. NCS000S78 Phone Number: 704-630-3086 Outfall Number: SWO81 (I Stantec Summary of Stormwater Discharge Outfall (SDO) Qualitative Monitoring Reports Date: Discharge Assessment Erosion / Deposition Total Event Precipitation (in) Color Odor Clarity Floating Solids Suspended Solids Foam Oil Sheen 2/2022 No qualifying flow for the month of February 3/2022 No qualifying flow for the month of March 4/2022 No qualifying flow for the month of April 5/23/2022 No qualifying flow for the month of May 6/2022 No qualifying flow for the month of June 7/2022 No qualifying flow for the month of July 8/2022 No qualifying flow for the month of August 9/2022 No qualifying flow for the month of September 10/2022 No qualifying flow for the month of October 11/2022 No qualifying flow for the month of November 12/2022 No qualifying flow for the month of December Notes: Value assessment of 1-5 for Clarity, Floating Solids and Suspended Solid. Values increasing upward by severity 1 = Best Case and 5 = Worst Case Buck Station Stormwater Permit Renewal Application Attachment 7 Summary of BMP's BMP Summary Outfall 075 The area that drains to Outfall 0075 consists of a laydown yard, trailers, construction storage yard warehouse, construction material laydown, outage laydown. As much as possible, raw materials are stored in the warehouse. Any chemicals stored in this area are stored in the warehouse. Stormwater that discharges from Outfall 075 is collected in a 0.83-acre stormwater retention pond. The discharge of the pond is controlled manually. When the pond discharges, the stormwater enters a grassed swale and flows approximately 1,700 feet the outfall. The conveyed stormwater is then discharged to the Yadkin River. Outfall 001 Combined Cycle The area that drains to combined cycle Outfall 001, is this combined cycle station footprint. All roof drains and all stormwater runoff from external paved areas enters catch basins that discharge via subsurface piping into the stormwater detention pond located immediately west of the CTCC. All internal building floor drains discharge either directly into the station consolidated wastewater sump or into the oil/water separator that subsequently discharges into the sump. All transformer containments discharge into the stormwater detention pond. All other open containments, including tanker unloading stations, discharge directly into the detention pond. Most covered containments at the station are non -discharge containments. Much like stormwater that discharges through Outfall 075, stormwater that discharges from the Combined Cycle to Outfall 001 CC is collected in an approximately 1-acre stormwater detention pond. The discharge of the pond is controlled manually. Outfall 001 CC is located at the discharge of the stormwater retention pond. SDO Narrative Description and BMP Summary OutfalllD: SWO01 Discharge 24' CMP Structure: Location: 400 feet west-northwest of as turbine building. Latitude - 35' 42' 30"N, 80" 22' 41" W Longitude: Drainage Area: 29.2 acres Percent 56% Impervious: Permit None Monitorin Table: l., DUKE ENERGY. Location: Buck CTCC Station Permit No. NCSOOOSS4 Industrial Drainage Area SWO01 is comprised of the Buck CC station plus the cooling Activities and tower, a clarifier, office buildings, and a detention pond. The drainage area is Description mostly paved roadways and building area but the runoff discharge is delayed by using a detention pond. Oil -filled electrical equipment including transformers is located within curbed concrete containment pads with manually operated drain valves. Lubricating system are located within the gas and steam turbine buildings that have isolated sumps should a spill occur. Natural gas pipelines run underground to provide fuel to the station. Bulk storage containers containing fuel oils are located around the site. Transfer operations for fuel oil occur near the bulk storage containers. Significant Mineral Oil: Mineral oil is stored in various transformers. The largest MaterialslPotenti al Pollutants, transformer contains 16,002 gallons of mineral oil, with the total mineral oil contained in all the electrical equipment being approximately 60,096 gallons_ Lube Oil: Lube oil is stored in lubricating systems within the two turbine buildings. The total lube oil contained within the two buildings is approximately 17,880 gallons. Fuel Oil: Diesel, kerosene, and gasoline are stored in bulk storage containers around the site. The total petroleum -based fuel oil is approximately 23,254 gallons. 1DUKE P ENERGY. Location: Buck CTCC Station SOO Narrative Description and BMP Summary Permit No. NCSCOOSS4 MP Summary: Delivery Vehicles • Develop prgcedu,.re for the Inspection of all vehicles arriving on the plant site a'Qijensure overall integrity of_the body or container. LI "d $I#"' Tanks/Large:.Bufk Fuel StaragelAbeve Ground Tanks Prroo'�de secondary containment with a secured valve in the closed • Develop Arid implement SPCC plan •. =Train'empkryeas 10_spiil prevention and control. Fuel Oil Unloading leas • F0o*p!oWgre ferfuel transfer In SPCC based on Department of Transportation's procedures. • An,n,oil-Atec separator Is part of the yard drainage around the generating equiprnerit Oil Beafing.Equipment • Provide:secondary containment with a secured valve in the closed :position: • An oil-wsterseparator-is part of She yard drainage around the generating equipment • Train.:employees. in spill prevention, control, cleanup and proper materials management techniques. Vehicle Maintenance • Traln employees In spill prevention, control, cleanup and proper materials management techniques. • Spill kits are readily available for use. Location: Buck Steam Station SDO Narrative Description and BMP Summary Permit No. NCSOOOS78 O utfa I I ID S W-075 Discharge Structure 30"CMP Location 150 feet east of yard sump, outside of station fence Latitude - 35042'49"N Longitude: 80022'22"W No Photo Available Due to Access Drainage Area: 36.3 acres Percent 36.6% Impervious: Permit 2 Monitoring Table: Industrial Drainage Area SW075 is a large, partially vegetated area with paved and Activities and gravel Description: roads as well as former rail corridor areas. The drainage area is natural ground and sheet flows to SW075 and the Yakin River. It includes the former/closed location of the fuel storage tank. Significant Laydown yard, construction storage yard, warehouse, construction Materials/Potential material laydown and outage laydown. Pollutants: BMP Summary: Delivery Vehicles • Develop procedure for the inspection of all vehicles arriving on the plant site and ensure overall integrity of the body or container. Vehicle Maintenance • Train employees in spill prevention, control, cleanup and proper materials management techniques. • Spill kits are readily available for use. Buck Station Stormwater Permit Renewal Application Attachment 8 Significant Site Changes Narrative of Significant Site Changes The old Buck Steam Station Powerhouse and associated facilities have been demolished, with the demolition of the powerhouse, the outfalls associated with it have also been eliminated, that includes outfalls SW-005, SW-007, SW-011, SW-015, SW-016, SW-023, SW-025, SW-027, SW-032, SW-034, SW-035, SW-038, SW-039, SW-058, SW-065, SW-066, SW-067, SW-069, SW-070, SW-071, and SW-072. The area in the vicinity the old steam station powerhouse has been cleaned up and industrial activity in those areas have been eliminated. The stormwater outfalls in the vicinity of the old steam station including SW-003, SW-048, SW-056, SW-078, SW-079, SW-080 and SW-081 have been eliminated (pipe has been removed or plugged) such that there will not be a discharge from the outfalls. The area in the vicinity the old steam station powerhouse, railroad and access road has been cleaned up and industrial activity in those areas have been eliminated. Stormwater Outfalls SW- 073 and SW-077 are in the vicinity of the powerhouse railroad and access road, however since their drainage area has been cleaned -up, they no longer discharge stormwater associated with industrial activity. Outfalls SW-001 and SW-002 are outfalls associated with a switchyard that was used by the demolished coal-fired steam station. The switchyard is still onsite and used by Energy Delivery however, it functions as a standalone switchyard. It is located in the vicinity of the old steam station powerhouse and all industrial activity around the switchyard has been eliminated. The switchyard is hydraulically separate from the remaining power generating facility at the station site, the Buck Combined Cycle Station Buck Station Stormwater Permit Renewal Application Attachment 9 Certification of Development of SWPPP STORMWATER POLLUTION PREVENTION PLAN DEVELOPMENT AND IMPLEMENTATION CERTIFICATION North Carolina Division of Energy, Mineral; and Land Resources — Stormwater Program Facility Name: Permit Number: Location Address Buck Combined Cycle Station NCSCO0554 1385 OukLAle Rd Salisbury NC 28146 County: Rowan "I certify, under penalty of law, that the Stormwater Pollution Prevention Plan (SPPP) document and all attachments were developed and implemented under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information required by the SPPP. Based on my inquiry of the person or persons who manage the system, or those persons directly responsible for gathering the information, the information gathered is, to the best of my knowledge and belief, true, accurate and complete." And "I certify that the SPPP has been developed, signed and retained at the named facility location, and the SPPP has been fully implemented at this facility location in accordance with the terms and conditions of the stormwater discharge permit." And "I am aware that there are significant penalties for falsifying information, including the possibility of fines and imprisonment for knowing violations." Sign (according to Permit signatory requirements) and return this Certification. DO NOT SEND STORMWATER POLLUTION PREVENTION PLAN WITH THIS CERTIFICATION. Signature a Kris Eisenrieth Print or type name of person signing above Date I Iz-i b&I z 3 General Manager II - Regulated Slations Title SPPP Certification 10/13 Buck Station Stormwater Permit Renewal Application Attachment 10 Email Bethany Georgoulias Regarding Industrial Permitting for Substations '6'sDishmon, Joyce Martin —& From: Georgoulias, Bethany<bethany.georgoulias@ncdenr.gov> Sent: Wednesday, May 8, 2019 9.28 AM To: Dishmon, Joyce Martin: Lucas, Annette; Garcia, Lauren V Subject: RE: Stormwater Permitting Status of Switchyards *** Exercise caution. This is an EXTERNAL email. DO NOT open attachments or click links from unknown senders or unexpected email. *** Joyce, The answer comes with a couple caveats that I wanted to explain thoroughly. Switchyards or substations by themselves are not "categorically" captured by the NPDES Stormwater program unless designated for some other reason. So, in cases where these yards are completely hydraulically separate (usually between the power plant and a different property), they were not necessarily subject to a permit. However, there are a few of scenarios where they could be considered subject to an NPDES permit. If a switchyard had industrial activities regulated by NPDES Stormwater, or legacy materials from those activities that still present in that drainage area, it would be subject. This includes the situations where switchyard runoff commingles with runoff from other areas of a power plant this is covered under an NPDES permit. A switchyard could also be designated, if there is a water quality problem or it is deemed a significant contributor of pollutants. This is done by agency designation (and it applies to most activities in general). Finally, if a switchyard is considered an integral part of the power plant that is under an NPDES permit, that area is essentially co -located and part of that industrial activity, and it would be subject to the permit. That is consistent with how EPA interprets what is included as that plant's industrial activity, as switchyards are included in the Industrial Fact Sheet series for Steam Electric Plants: INDUSTRIAL STORMNVATER FACE SHEET SERIES Sector 0 Stearn Electric Power Generating Facilities, Including Coal Handling Areas Table 2. BMPs for Potential Pollutant Sources at Steam Electric Generating Facilities, induding Coal Handling Areas (continued) Pollutant Source $MPS Qii bearing 0 Construct level grades and gravel surfaces to retard flows and limit the spread of spills equornent switdVards ❑ Collect stormwater runoff in pefirneter ditches. ..-..5,....&w.. I m +u...-.r+ ti —*,.J — 3.`;e.r..wl.:rl.v fn, e..r.r._..+...-, ;+ — -. +hn I.. -. 4 —L— —+n ..,+n Because i couldn't make the meeting you had with Annette, I didn't see the site plan or map to understand the situation you're asking about. Sometimes these switchyards are far removed from plant footprints, and other times they are more integrated, so Vd need more information to answer the question on the specific case. Buck Station Stormwater Permit Renewal Application Attachment 11 Site Narrative GENERAL SITE INFORMATION The Buck Combustion Turbine Combined Cycle Plant (CTCC) is a natural gas fired, 620- megawatt electric generating station located in Rowan County approximately 3 miles east of Spencer, NC. The facility contains two primary combustion turbine units and one secondary heat recovery steam generator unit. The facility is located on a 643-acre property that formerly contained the Buck Steam Station, which has now been demolished. The property borders the southern shore of the Yadkin River in the upper reaches of high Rock Lake. The station is accessed from Dukeville Road off Long Ferry Road. Also located within the Buck CTCC property boundary is the Buck Tie Station. The Buck Tie Station is a large 230 kV and 110 kV regional substation facility located approximately 1,500 feet south and upgradient of the Yadkin River. This tie station is a separate facility and hydraulically unassociated with the Buck CTCC station from a stormwater permitting standpoint. The CTCC contains 2 industrial stormwater outfalls. Outfall SW-001 is associated with the 14- acre CTCC Power block, the stormwater from the power block area is routed to a stormwater retention pond that discharges to the Yadkin River through Outfall SW 001. Outfall SW 075 is associated with gravel roadway and gravel surface areas including a laydown area and a warehouse that discharges to the Yadkin River. The Buck Steam Station maintains an up-to-date Spill Prevention Control and Countermeasure (SPCC) Plan in place in accordance with the U.S. Environmental Protection Agency (USEPA) Oil Pollution Prevention Regulation 40 CFR Part 112. STORMWATER OUTFALLS AND DRAINAGE AREA DESCRIPTIONS Buck Combustion Turbine Combined Cycle Station has 2 identified active stormwater outfalls that discharge to surface waters. The outfall locations and contributing drainage area delineations are shown on the accompanying site plan drawing. All identified stormwater outfalls either discharge directly into the Yadkin River, or discharge onto the ground in close proximity to the river. A description of the contributing drainage area for each outfall is provided below. Included with the description is the approximate location coordinates of the outfalls, the approximate amount of impervious surface area within the drainage areas, a description of any significant materials and activities located within the drainage areas, the type of discharge conveyances, and a description of any discharge control measures. In addition to any significant materials particular to each drainage basin, herbicides are applied to selected areas at the Buck Steam Station to eliminate undesirable vegetation. Herbicides are generally used along railways, pipelines, and the perimeter fence. Herbicides are also applied, as needed, in the gravel parking lots, switchyard, laydown areas, yard sumps, transformers, trailers, and the intake structure. The discharge of herbicides are covered under the NPDES general permit NCG560000. Records are retained at the facility documenting the areas treated, and the type and amount of herbicides used. Outfall SW075 (Drainage Area 75) (currently included in NCS000578) Discharge Structure: 30-inch-diameter CMP Location: Approximately 150 feet east of yard sump, outside of station fence. Coordinates: 35" 42' 49" N 800 22' 22" W Drainage Area: 36.3 acres Impervious Area: 13.4 acres Area Description The drainage area for SW075 is comprised of a gravel roadway, gravel -surfaced areas surrounding part of a paved roadway, and grassed areas. The drainage area contains approximately 250 linear feet of gravel roadway. The area at the south end of the drainage area includes the maintenance yard and facility for the Buck site and is primarily a gravel lot. Significant Materials/Activities Mineral oil, ammonia, raw water chemical treatment Outfall 001 (currently included in NCS000554) Discharge Structure: 48 inch diameter CMP Coordinates: 35 42' 30" N 80 22' 40" W Industrial Use Drainage Area: 18.9 Acres Approximate Impervious Area: 10.8 acres Accessibility: Accessible Area Description The industrial use area surrounding the CTCC facility covers approximately 14 Acres. This area is comprised primarily of building roofs with asphalt pavement or gravel surface areas surrounding the buildings. Included within this drainage area are some minor vegetated areas located east of the cooling tower and in the vicinity of the water treatment facility. The drainage area includes two gas turbine buildings, two heat recovery steam (HRSG) buildings, one stream turbine building, one water treatment building, one auxiliary boiler building, one cooling tower structure, two chiller buildings, one administration/control/warehouse building, a raw water treatment facility, several large transformers, a power distribution center, an emergency diesel generator, three large water tanks, one large ammonia tank, an oil/water separator, an oil storage building and the station consolidated wastewater sump. All roof drains and all stormwater runoff from external paved areas enters catch basins that discharge via subsurface piping into the stormwater detention pond located immediately west of the CTCC. All internal building floor drains discharge either directly into the station consolidated wastewater sump or into the oil/water separator that subsequently discharges into the sump. All transformer containments discharge into the detention pond. All other open containments, including tanker unloading stations, discharge directly into the detention pond. Most covered containments at the station are non -discharge containments. Significant Materials/Activities Lube Oil: Both Gas and turbine buildings contain one 4,500-gallon lube oil tank. The tanks are located within concrete containments. The steam turbine building contains one lube oil tank within concrete containment with an open drain to the oil/water separator. Diesel Fuel: The emergency diesel generator enclosure contains 550 gallons of diesel fuel located within a double -walled container integral with the generator. Mineral Oil: Various quantities of mineral oil are stored inside two gas turbine main step-up transformers, the two, gas turbine auxiliary transformers, the steam turbine main set-up transformer, and five excitation transformers. All of these transformers are located outside within locked -closed concrete containments that drain to the detention pond. Ammonia: One 20,000-gallon ammonia tank is located on the western side of the facility. The tank is located within an open concrete containment with a valved drain to the consolidated wastewater sump. A sloped and curbed concrete unloading pad is located adjacent to the tank and has a locked -closed valved drain to the consolidated detention pond. One 300-gallon ammonia tank is located inside the steam turbine Building. One 300-gallon ammonia tank is located inside the aux boiler Building. The tanks are within a concrete containment basin with an open drain to the oil/water seperator. Chemicals: The raw water treatment facility contains one sodium hypochlorite tan, one ferric sulfate tank, .and one caustic tank. The tank is located under a common shed within a dead end covered concrete containment basins. A sloped and curbed concrete chemical unloading pad is located adjacent to the shed and has an open drain to the detention pond. The cooling tower has an adjacent chemical fed skid that contains one sodium hypochlorite tank, one dispersant tank, one micro biocide tote, and one water treatment tote. The four containers are located under a common shed within a dead end covered concrete containment basins. A sloped and curbed concrete chemical unloading pad is located adjacent to the shed and has an open drain to the detention pond. The water treatment building is a fully enclosed structure that contains one sodium hypochlorite tank, one sodium bisulfate tank, one sodium hydroxide tank, one RO citric acid tote and one RO anti-scalant tote. All containers are located within dead end concrete containments. The building floor drains discharge into the consolidated wastewater sump. The Auxiliary Boiler Building is a fully enclosed structure that contains one 19% ammonia tote and one Eliminox tote. The containers are located within dead end concrete containments. The gas filter skid contains one condensate tank located within an open metal containment bin with an open drain to the consolidated wastewater sump. Two phosphate skids are enclosed in a building and located adjacent to the HRSG buildings. These containers are located within concrete containments with open drains to the consolidated wastewater sump. One small gas condensate tote is located on the east side of each HRSG building. Discharge Controls All stormwater runoff from the CTCC station (outfall 001) eventually discharges into a stormwater detention pond located immediately west of the facility. The pond outlet works are comprised of a 60-inch CMP riser and 48-inch CMP barrel. The pond is dewatered by a small diameter dewatering orifice at the bottom of the 60-inch riser. In the event of any chemical or petroleum release into the stormwater drainage system the small orifice can be quickly covered or blocked to contain the release within the detention pond. The discharge end of the 48-inch CMP is designated as Outfall 001. Stormwater discharging from SW001 enters a riprap lined channel that routes flow to an existing 24-inch CMP beneath the station access road. The discharge eventually enters the Yadkin River west of the CTCC. Buck Station Stormwater Permit Renewal Application Attachment 12 Recission Request Form FOR AGENCY USE ONLY Assigned to: ARO FRO MRO RRO WARO WIRO WSRO Division of Energy, Mineral, and Land Resources Land Quality Section National Pollutant Discharge Elimination System Rescission Request Form Please fill out and return this form if you no longer need to maintain your NPDES stormwater permit. Directions: Print or type all entries on this application form. Send the original, signed application to: NCDEMLR Stormwater Program, 1612 Mail Service Center, Raleigh, INC 27699-1612. The submission of this form does not guarantee recission of your NPDES stormwater permit. Prior to the recission of your NPDES stormwater permit, a site inspection will be conducted. 1. Owner/Operator (to whom all permit correspondence will be mailed): Name of legal organizational entity: Legally responsible person as signed in Item (4) below: Duke Energy Carolinas, Inc Kris Eisenrieth Street address: City: State and zip code: 1385 Dukeville Rd Salisbury NC 28146 Telephone number: Email address: 704,630.3015 kris.eisenrieth@duke-energy.com 2. Industrial Facilitv (facility reauestine rescission): Facility name: Buck Steam Station Street address: 1385 Dukeville Rd City: State: Zip Code: County: Salisbury NC 28146 Rowan Permit Number to which this request applies: NGS000578 3. Reason for rescission Request 1111,y Ib ICl4u I1Cu ::III HtA-Cb�-dly. Il Facility is closed or closing. All industrial activities have ceased such that no discharges of stormwater are contaminated by exposure to industrial activities or materials. Date closed/closing: March 19, 2018 Il Facility sold. Sold to: On date: i] Other (please explain): 4. Applicant Certification: North Carolina General Statute 143-215.613 (i) provides that: Any person who knowingly makes any false statement, representation, or certification in any application, record, report, plan, or other document filed or required to be maintained under this Article or a rule implementing this Article ... shall be guilty of a Class 2 misdemeanor which may include a fine not to exceed ten thousand dollars ($10,000). 1 hereby request exclusion from NPDES stormwater permitting. under penalty of law, I certify that: I] I, as an authorized representative, hereby request recission of coverage under the NPDES stormwater Permit for the subject facility. I am familiar with the information contained in this request and to the best of my knowledge and belief such information is true, complete, and accurate. Printed Name of Person Signing: Kris Eisenrieth Title: General Manager II - Regulated Stations 24 2Uz3 (Signa ure of Applicant) ( Date Signed) Mail the entire package to: DEMLR—Stormwater Program Department of Environmental Quality 1612 Mail Service Center Raleigh, NC 27699-1612 Page 2 of 2 Buck Station Stormwater Permit Renewal Application Attachment 13 Fish Tissue Monitoring Results Fish Tissue Monitoring of the Yadkin River and High Rock lake Near Buck Combined Cycle Station (2018-2022) Buck Combined Cycle Station Salisbury, North Carolina NPDES Permit # NCO004774 Duke Energy Water Resources Huntersville, NC 28078 January 2023 (� DUKE ENERGY. Fish Tissue Monitoring of the Yadkin River and High Rock Lake Near Buck Combined Cycle Station (2018-2022) Buck Combined Cycle Station Contents 1 Introduction and Background......................................................................................................1 2 Methods.....................................................................................................................................1 2.1 Study Site...........................................................................................................................................1 2.2 Field Collection..................................................................................................................................2 2.3 Laboratory Analysis...........................................................................................................................3 3 Results and Discussion................................................................................................................3 3.1 Arsenic...............................................................................................................................................4 3.2 Selenium............................................................................................................................................4 3.3 Mercury .............................................................................................................................................4 4 Summary ....................................................................................................................................6 5 References.................................................................................................................................6 Tables Table 3-1. Numbers and total length ranges (mm) of different species of fish collected for element analyses in the three sampling areas of the Yadkin River and High Rock Lake during 2018-2022.3 Figures Figure 2-1. Sampling areas for monitoring trace elements in fish tissue within the Yadkin River and High RockLake..........................................................................................................................................2 Figure 3-1. Box plots of trace element analysis of fish muscle tissue for sunfish and black bass collected from three areas of the Yadkin River and High Rock Lake during 2018-2022. Boxes and whiskers show the 10th, 25th, 50th, 75th, and 90th percentiles. Individual outliers are represented by points. Values under each element are USEPA screening values for recreational anglers.............5 Appendices Appendix A Arsenic, selenium, and mercury concentrations (fresh weight) in axial muscle of fish from the Yadkin River and High Rock Lake during 2018-2022 Fish Tissue Monitoring of the Yadkin River and High Rock Lake Near Buck Combined Cycle Station (2018-2022) Buck Combined Cycle Station 1 Introduction and Background Duke Energy Carolinas (DEC) owns and operates the Buck Combined Cycle Station (Buck) located on the Yadkin River in Rowan County, Salisbury, North Carolina. The National Pollutant Discharge Elimination System (NPDES) Wastewater Permit for Buck (No. NC0004774, Section C.12) requires DEC to annually conduct trace elements (specifically arsenic, selenium, and mercury) monitoring in fish muscle tissue in accordance with a study plan approved by the North Carolina Department of Environmental Quality (NCDEQ). Monitoring is required due to the discharge of waters from a coal ash basin associated with the previous coal-fired steam plant at the site. A study plan was originally submitted and approved in 2013 (Duke Energy 2013), and an updated study plan was submitted and approved in 2019 (Duke Energy 2019). 2 Methods 2.1 Study Site Fish were collected from two areas on the Yadkin River and one in upper High Rock Lake (Figure 1-1) for trace element analysis of muscle tissue. Area UP was located at least 3.2 km upstream of the Buck ash basin discharge to serve as a reference to monitor background trace element concentrations in fish muscle tissue. Area DI was located between 0.8 km and 2.0 km downstream from the Buck ash basin discharge to monitor potential near -field uptake of trace elements in fish muscle tissue. Area DN was located in upper High Rock Lake, approximately 8.0 km downstream of the ash basin discharge, to monitor far -field uptake of trace elements in fish muscle tissue. Fish Tissue Monitoring oft he Yadkin Rivera nd High Rock Lake Near Buck Combined Cycle Station (2018-2022) Buck Combined Cycle Station N A UP Dll BUCK Dolma 002 COMBINED ourc�uam CYCI.E STATION F' fZ Trace Element Fishing Area A Duke Facility Outfall 0 25 5 Kilometers Buck Combined Cycle Station DUKE ENERGY. Figure 2-1. Sampling areas for monitoring trace elements in fish tissue within the Yadkin River and High Rock Lake. 2.2 Field Collection Fish were collected for trace element tissue monitoring following the appropriate Duke Energy procedures under Duke Energy's North Carolina Biological Laboratory Certification (Huntersville, NC certification 008). Fish were collected using boat electrofishing, identified to species, measured for total length to the nearest millimeter, weighed to the nearest gram, and marked with a unique tag identifier. Fish were then placed in a labeled (sample date, sample location, facility, etc.) bag on ice while in the field. Bags were sealed and transferred to a deep freezer at the end of the sampling day until processed for analysis. Sunfish (Lepomis) and black bass (Micropterus) were targeted for collection based on prior sampling experience, likely availability, potential for human consumption, and general trophic level. Other similar genera of fish were collected when the primary target genera were unavailable. Duke Energy personnel collected six individuals of each taxa from each sampling area. Individuals retained for analysis were those considered of sufficient size for human consumption (>_6a g). As recommended by the US Environmental Protection Agency (USEPA), fish were retained such that the size of the smallest Fish Tissue Monitoring of the Yadkin River and High Rock lake Near Buck Combined Cycle Station (2018-2022) Buck Combined Cycle Station individual would not be less than 75% of the total length of the largest fish within each genus group when possible (USEPA 2000). 2.3 Laboratory Analysis Fish were processed for metals analysis at the Duke Energy Trace Element Laboratory located in New Hill, NC. Fish were thawed and skeletal muscle was fileted off using a carbon -steel scalpel. Muscle tissue from each individual fish was homogenized, weighed to the nearest 0.001 g, completely dried in a desiccator. The dried weight was recorded and used to calculate a dry weight to fresh weight ratio for that fish. Approximately 0.1 g of dried tissue was analyzed for each fish using X-ray fluorescence. Quality control was achieved utilizing analytical standards, replicates, and certified reference materials. 3 Results and Discussion During the study period (2018-2022),180 individuals representing eight species were captured and analyzed from the Yadkin River and High Rock Lake (Table 3-1). These species included Alabama Bass Micropterus hensholli, Largemouth Bass M. salmoides, Black Crappie Pomoxis nigromaculatus, Bluegill Lepomis macrochirus, Green Sunfish L. cyanellus, Redbreast Sunfish L. ouritus, Redear Sunfish L. microlophus, and Warmouth L. gulosus. A full list of individual fish and associated trace element concentrations is presented in Appendix A. Table 3-1. Numbers and total length ranges (mm) of different species of fish collected for element analyses in the three sampling areas of the Yadkin River and High Rock Lake during 2018-2022. UP DI DN Total Total length Total length Number Number Number length range range range Alabama Bass 2 293-410 — — Black bass Largemouth 26 276-499 30 247-515 30 288-471 (Micropterus) Bass Black Crappiel 2 272-278 — — Bluegill 22 140-178 20 142-176 28 146-183 Green Sunfish — 1 175 — Sunfish Redbreast (Lepomis) Sunfish — 1 177 1 171 Redear Sunfish 7 159-183 8 155-250 1 186 Warmouth 1 191 — — 1 Black Crappie were kept as a surrogate for black bass because these species are in the same feeding guild (NCDENR 2006). 3 Fish Tissue Monitoring of the Yadkin River and High Rock Lake Near Buck Combined Cycle Station (2018-2022) Buck Combined Cycle Station 3.1 Arsenic All fish collected during 2018-2022 were below the USEPA screening value for recreational anglers of 1.2 µg/g (fresh weight) for arsenic (USEPA 2000; Figure 3-1). 3.2 Selenium All fish collected during 2018-2022 were below USEPA screening value for recreational anglers of 20 µg/g (fresh weight) for selenium (USEPA 2000; Figure 3-1). 3.3 Mercury Sunfish collected during 2018-2022 were below the USEPA screening value for recreational anglers of 0.4 µg/g (fresh weight) for mercury (USEPA 2000; Figure 3-1). Of the 88 black bass sampled during the five-year study period, one exceeded the mercury screening value. Mercury concentrations generally increased with fish size, regardless of the collection area. This individual was in the top quartile of size for all black bass collected. Therefore, this elevated mercury concentration was a function of bioaccumulation. 4 Fish Tissue Monitoring of the Yadkin River and High Rock Lake Near Buck Combined Cycle Station (2018-2022) Buck Combined Cycle Station Sunfish Black bass 1.0 0.8 0.6 0.4 0.2 0.0 1.0 0.8 0.6 0.4 0-2 0.0 UP DI DN UP DI DN 1.4 t 12 T 1.0 m 0.8 0 0.6 CO m 0.4 c LO 02 00 1.4 12 1.0 0.8 0.6 0.4 02 00 UP DI DN UP DI DN 05 05 0.4 03 0.2 0.1 00 Mercury 0.4 pgl9 • 0.4 0.3 • • 02 • D,1 i 4 D.0 UP DI DN UP DI DN Figure 3-1. Box plots of trace element analysis of fish muscle tissue for sunfish and black bass collected from three areas of the Yadkin River and High Rock Lake during 2018-2022. Boxes and whiskers show the 10th, 25th, 50th, 75th, and 90th percentiles. Individual outliers are represented by points. Values under each element are U5EPA screening values for recreational anglers. 5 Fish Tissue Monitoring of the Yadkin River and High Rock Lake Near Buck Combined Cycle Station (2018-2022) Buck Combined Cycle Station 4 Summary All fish collected during the 2018-2021 study period were below the USEPA screening levels for recreational anglers for arsenic and selenium. One black bass exceeded the screening level for mercury. However, mercury concentrations in black bass collected at the DI area were not elevated compared to those collected upstream of the Buck ash basin discharge when accounting for size of fish. These patterns match samples reported from the same areas in 2014 (Duke Energy 2014). 5 References Duke Energy. 2013. Trace elements monitoring in fish tissue study plan. Duke Energy Corporation. Charlotte, NC. Duke Energy. 2014. Arsenic, selenium, and mercury monitoring in fish muscle tissue from upper High Rock Lake, NC. Duke Energy Corporation. Charlotte, NC. Duke Energy. 2019. Fish tissue monitoring of the Yadkin River. Duke Energy Corporation. Charlotte, NC. NCDENR. 2006. Standard operating procedure. Biological monitoring. Stream fish community assessment program. Environmental Sciences Section, Division of Water Quality, North Carolina Department of Environmental and Natural Resources. Raleigh, NC. USEPA. 2000. Guidance for assessing chemical contaminant data for use in fish advisories. Vol. 1. Fish sampling and analysis. Third edition. EPA 823-B-00-007. United States Environmental Protection Agency, Office of Water, Washington, DC. R Fish Tissue Monitoring of the Yadkin River and High Rock Lake Near Buck Combined Cycle Station (2018-2022) Buck Combined Cycle Station Appendix A Arsenic, selenium, and mercury concentrations (fresh weight) in axial muscle of fish from the Yadkin River and High Rock Lake during 2018-2022 Dry -to - fresh Collection Length Weight As Se Hg weight Fish species Location month (mm) (g) W/O (µg/g) W/O ratio Bluegill UP November 2018 140 52 0.16 0.49 <0.06 0.20 Bluegill UP November 2018 178 120 0.14 0.33 <0.06 0.19 Bluegill UP November 2018 165 86 0.15 0.31 <0.06 0.20 Bluegill UP November 2018 178 112 0.15 0.39 0.07 0.20 Bluegill UP November 2018 159 75 0.14 0.36 <0.06 0.20 Bluegill UP November 2018 144 54 0.15 0.48 <0.06 0.20 Alabama Bass UP November 2018 410 972 0.20 0.31 0.23 0.24 Black Crappie UP November 2018 278 324 0.23 0.23 <0.06 0.20 Black Crappie UP November 2018 272 293 0.18 0.32 <0.06 0.20 Largemouth Bass UP November 2018 499 2403 0.17 0.31 0.30 0.20 Largemouth Bass UP November 2018 348 719 0.16 0.31 0.12 0.20 Largemouth Bass UP November 2018 411 1098 0.17 0.34 0.19 0.20 Bluegill DI November 2018 152 60 0.13 0.40 0.11 0.17 Bluegill DI November 2018 152 62 0.13 0.52 <0.05 0.17 Bluegill DI November 2018 153 60 0.13 0.46 0.06 0.17 Bluegill DI November 2018 167 75 0.17 1.18 <0.06 0.20 Bluegill DI November 2018 158 75 0.14 0.70 0.06 0.19 Bluegill DI November 2018 158 70 0.14 0.36 <0.05 0.18 Largemouth Bass DI November 2018 452 1723 0.17 0.48 0.35 0.20 Largemouth Bass DI November 2018 343 669 0.14 0.40 0.15 0.19 Largemouth Bass DI November 2018 407 1131 0.17 0.62 0.18 0.20 Largemouth Bass DI November 2018 430 1238 0.19 0.34 0.22 0.20 Largemouth Bass DI November 2018 415 1156 0.19 0.32 0.15 0.21 Largemouth Bass DI November 2018 383 947 0.15 0.34 0.13 0.20 Bluegill DN October 2018 176 98 0.13 0.20 <0.05 0.17 Bluegill DN October 2018 170 83 0.13 0.22 <0.05 0.17 Bluegill DN October 2018 164 74 0.14 0.26 <0.06 0.20 Bluegill DN October 2018 155 64 0.14 0.21 <0.06 0.19 Bluegill DN October 2018 152 58 0.16 0.32 <0.06 0.20 Bluegill DN October 2018 152 57 0.15 0.23 <0.06 0.20 Largemouth Bass DN October 2018 288 315 0.20 0.22 <0.06 0.20 Largemouth Bass DN October 2018 319 399 0.23 0.21 <0.06 0.20 Largemouth Bass DN October 2018 374 752 0.20 0.26 0.07 0.21 Largemouth Bass DN October 2018 378 775 0.22 0.25 0.11 0.22 Largemouth Bass DN October 2018 306 371 0.20 0.25 <0.06 0.21 Largemouth Bass DN October 2018 334 516 0.17 0.23 <0.06 0.20 Bluegill UP September 2019 166 90 0.14 0.53 0.08 0.19 Bluegill UP September 2019 153 65 0.14 0.53 0.08 0.19 Bluegill UP September 2019 148 60 0.13 0.34 <0.06 0.20 Bluegill UP September 2019 153 64 0.14 0.44 0.06 0.19 A-1 Fish Tissue Monitoring of the Yadkin River and High Rock Lake Near Buck Combined Cycle Station (2018-2022) Buck Combined Cycle Station Dry -to - fresh Length Weight As Se Hg weight Fish species Location Sample date (mm) (g) (µg/g) (µg/g) (µg/g) ratio Bluegill UP September 2019 163 72 0.14 0.31 <0.05 0.18 Bluegill UP September 2019 158 76 0.13 0.43 0.05 0.18 Largemouth Bass UP September 2019 328 428 0.15 0.35 0.09 0.20 Largemouth Bass UP September 2019 371 730 0.17 0.35 0.11 0.21 Largemouth Bass UP September 2019 457 1367 0.17 0.35 0.22 0.21 Largemouth Bass UP September 2019 427 1196 0.18 0.37 0.32 0.21 Largemouth Bass UP September 2019 338 496 0.18 0.27 0.10 0.20 Largemouth Bass UP September 2019 439 1273 0.14 0.25 0.27 0.16 Bluegill DI September 2019 157 69 0.13 0.54 0.06 0.19 Redear Sunfish DI September 2019 250 258 0.13 0.68 0.08 0.19 Redear Sunfish DI September 2019 207 140 0.16 0.70 0.07 0.20 Redear Sunfish DI September 2019 202 133 0.16 0.59 0.08 0.20 Redear Sunfish DI September 2019 244 252 0.17 0.56 0.13 0.20 Redear Sunfish DI September 2019 220 195 0.15 0.68 0.09 0.20 Largemouth Bass DI September 2019 344 534 0.17 0.37 0.09 0.20 Largemouth Bass DI September 2019 293 342 0.15 0.38 0.10 0.20 Largemouth Bass DI September 2019 305 419 0.17 0.50 0.09 0.20 Largemouth Bass DI September 2019 300 346 0.15 0.40 0.12 0.20 Largemouth Bass DI September 2019 274 292 0.15 0.34 0.10 0.20 Largemouth Bass DI September 2019 294 296 0.12 0.27 0.07 0.15 Bluegill DN May 2019 170 94 0.15 0.29 0.07 0.18 Bluegill DN May 2019 173 115 0.18 0.28 <0.04 0.19 Bluegill DN May 2019 175 106 0.13 0.45 <0.05 0.19 Bluegill DN May 2019 169 85 0.14 0.24 <0.05 0.18 Bluegill DN May 2019 169 82 0.15 0.25 0.06 0.18 Bluegill DN May 2019 169 92 0.14 0.28 <0.04 0.18 Largemouth Bass DN May 2019 411 1017 0.19 0.24 0.12 0.20 Largemouth Bass DN May 2019 381 726 0.25 0.22 0.13 0.20 Largemouth Bass DN May 2019 416 948 0.16 0.17 0.07 0.15 Largemouth Bass DN May 2019 405 1010 0.20 0.24 0.14 0.20 Largemouth Bass DN May 2019 410 1009 0.22 0.23 0.12 0.19 Largemouth Bass DN May 2019 380 774 0.24 0.25 0.09 0.21 Bluegill UP June 2020 143 65 0.15 0.63 <0.06 0.20 Bluegill UP October 2020 177 108 0.14 0.53 <0.06 0.19 Bluegill UP October 2020 173 95 0.13 0.48 <0.05 0.18 Bluegill UP October 2020 163 85 0.15 0.38 0.12 0.20 Redear Sunfish UP June 2020 164 78 0.15 0.48 0.08 0.19 Redear Sunfish UP October 2020 159 68 0.19 0.56 <0.06 0.20 Largemouth Bass UP June 2020 420 1410 0.19 0.28 <0.06 0.20 Largemouth Bass UP June 2020 487 1823 0.18 0.28 <0.06 0.20 Largemouth Bass UP June 2020 381 880 0.18 0.30 <0.06 0.21 Largemouth Bass UP June 2020 447 1355 0.17 0.30 0.09 0.20 Largemouth Bass UP June 2020 447 13SS 0.18 0.35 <0.06 0.20 Largemouth Bass UP October 2020 460 1460 0.13 0.26 0.05 0.15 Bluegill DI June 2020 163 83 0.12 0.43 <0.06 0.19 Bluegill DI June 2020 167 99 0.14 0.53 0.06 0.20 Bluegill DI June 2020 150 69 0.14 0.31 0.06 0.19 Bluegill DI June 2020 150 67 0.13 0.53 <0.05 0.18 Bluegill DI June 2020 153 82 0.14 0.45 0.21 0.20 A-2 Fish Tissue Monitoring of the Yadkin River and High Rock Lake Near Buck Combined Cycle Station (2018-2022) Buck Combined Cycle Station Dry -to - fresh Length Weight As Se Hg weight Fish species Location Sample date (mm) (g) (µg/g) (µg/g) (µg/g) ratio Bluegill DI June 2020 143 63 0.17 0.34 <0.06 0.20 Largemouth Bass DI June 2020 395 1082 0.18 0.34 <0.06 0.20 Largemouth Bass DI June 2020 310 476 0.19 0.34 0.10 0.20 Largemouth Bass DI June 2020 331 601 0.19 0.34 <0.06 0.21 Largemouth Bass DI June 2020 387 824 0.20 0.32 0.09 0.21 Largemouth Bass DI June 2020 314 523 0.20 0.32 0.13 0.21 Largemouth Bass DI June 2020 413 1362 0.17 0.34 <0.06 0.20 Bluegill DN May 2020 163 93 0.15 0.28 0.06 0.18 Bluegill DN May 2020 169 99 0.19 0.34 <0.06 0.20 Bluegill DN May 2020 170 102 0.15 0.26 0.07 0.18 Bluegill DN May 2020 150 72 0.16 0.26 0.09 0.20 Bluegill DN May 2020 150 66 0.17 0.46 <0.06 0.21 Bluegill DN May 2020 153 72 0.15 0.27 <0.06 0.19 Largemouth Bass DN May 2020 469 1670 0.18 0.26 <0.06 0.20 Largemouth Bass DN May 2020 460 1488 0.17 0.26 <0.06 0.20 Largemouth Bass DN May 2020 391 960 0.20 0.25 <0.06 0.21 Largemouth Bass DN May 2020 452 1218 0.15 0.31 <0.05 0.18 Largemouth Bass DN May 2020 471 1475 0.18 0.25 <0.06 0.19 Largemouth Bass DN May 2020 425 1158 0.20 0.25 <0.06 0.21 Bluegill UP June 2021 153 71 0.13 0.48 0.06 0.19 Bluegill UP June 2021 154 78 0.15 0.43 <0.06 0.20 Bluegill UP June 2021 142 65 0.15 0.56 <0.06 0.20 Redear Sunfish UP June 2021 180 113 0.14 0.95 <0.06 0.19 Redear Sunfish UP June 2021 172 100 0.14 0.64 <0.06 0.20 Redear Sunfish UP June 2021 162 97 0.17 0.49 <0.06 0.20 Largemouth Bass UP June 2021 464 1891 0.17 0.32 0.29 0.21 Largemouth Bass UP June 2021 422 1247 0.17 0.29 0.17 0.21 Largemouth Bass UP June 2021 445 1478 0.16 0.33 0.14 0.21 Largemouth Bass UP June 2021 443 1436 0.20 0.27 0.33 0.20 Largemouth Bass UP June 2021 392 1000 0.17 0.33 0.12 0.21 Largemouth Bass UP June 2021 366 735 0.15 0.38 0.12 0.20 Bluegill DI June 2021 142 61 0.13 0.43 <0.06 0.19 Bluegill DI June 2021 155 82 0.14 0.42 0.09 0.20 Bluegill DI June 2021 149 69 0.16 0.39 <0.06 0.19 Bluegill DI June 2021 158 86 0.16 0.37 <0.06 0.19 Redbreast Sunfish DI June 2021 177 129 0.17 0.50 0.07 0.21 Redear Sunfish DI June 2021 162 79 0.16 0.60 <0.06 0.20 Largemouth Bass DI June 2021 410 1081 0.20 0.36 0.23 0.21 Largemouth Bass DI June 2021 405 1151 0.15 0.25 0.09 0.18 Largemouth Bass DI June 2021 456 1520 0.18 0.36 0.29 0.20 Largemouth Bass DI June 2021 433 1238 0.21 0.43 0.16 0.21 Largemouth Bass DI June 2021 474 1835 0.19 0.38 0.17 0.21 Largemouth Bass DI June 2021 480 1677 0.18 0.35 0.31 0.21 Bluegill DN April2021 183 128 0.16 0.30 0.09 0.20 Bluegill DN Apri12021 175 113 0.15 0.31 0.07 0.20 Bluegill DN Apri12021 166 94 0.18 0.25 <0.06 0.20 Bluegill DN April 2021 165 91 0.16 0.48 <0.06 0.20 Bluegill DN April 2021 166 102 0.16 0.28 0.06 0.18 Redear Sunfish DN April 2021 186 141 0.16 0.31 <0.06 0.21 A-3 Fish Tissue Monitoring of the Yadkin River and High Rock Lake Near Buck Combined Cycle Station (2018-2022) Buck Combined Cycle Station Dry -to - fresh Length Weight As Se Hg weight Fish species Location Sample date (mm) (g) (µg/g) (µg/g) (µg/g) ratio Largemouth Bass DN April 2021 460 1500 0.19 0.23 0.18 0.20 Largemouth Bass DN April 2021 340 533 0.21 0.24 0.12 0.20 Largemouth Bass DN April 2021 382 897 0.20 0.24 0.13 0.20 Largemouth Bass DN April 2021 405 1006 0.21 0.23 0.12 0.20 Largemouth Bass DN April 2021 440 1055 0.22 0.25 0.19 0.21 Largemouth Bass DN April 2021 470 1744 0.15 0.21 0.29 0.16 Bluegill UP June 2022 163 92 0.15 0.51 <0.06 0.20 Bluegill UP June 2022 150 78 0.16 0.41 <0.06 0.20 Bluegill UP June 2022 154 74 0.18 0.39 <0.06 0.20 Redear Sunfish UP June 2022 183 103 0.13 0.80 <0.06 0.20 Redear Sunfish UP June 2022 176 101 0.18 0.67 <0.06 0.21 Warmouth UP June 2022 191 153 0.14 0.37 0.14 0.19 Alabama Bass UP June 2022 293 312 0.19 0.29 0.08 0.20 Largemouth Bass UP June 2022 359 611 0.19 0.26 0.14 0.20 Largemouth Bass UP June 2022 292 398 0.20 0.30 <0.06 0.21 Largemouth Bass UP June 2022 336 689 0.18 0.32 0.09 0.21 Largemouth Bass UP June 2022 276 289 0.18 0.37 0.07 0.21 Largemouth Bass UP June 2022 362 712 0.17 0.37 0.13 0.21 Bluegill DI June 2022 148 69 0.14 0.39 0.06 0.20 Bluegill DI June 2022 151 76 0.18 0.30 <0.06 0.19 Bluegill DI June 2022 176 98 0.14 0.33 <0.06 0.19 Green Sunfish DI June 2022 175 112 0.13 0.23 0.10 0.18 Redear Sunfish DI June 2022 155 72 0.16 0.63 0.06 0.19 Redear Sunfish DI June 2022 225 231 0.17 0.55 0.09 0.21 Largemouth Bass DI June 2022 515 2206 0.19 0.35 0.37 0.20 Largemouth Bass DI June 2022 451 1224 0.17 0.48 0.25 0.19 Largemouth Bass DI June 2022 447 1339 0.23 0.32 0.14 0.20 Largemouth Bass DI June 2022 451 1224 0.21 0.36 0.43 0.22 Largemouth Bass DI June 2022 460 1495 0.17 0.37 0.26 0.19 Largemouth Bass DI June 2022 289 375 0.19 0.31 <0.06 0.20 Bluegill DN May 2022 146 67 0.15 0.28 0.06 0.19 Bluegill DN May 2022 162 92 0.16 0.28 0.07 0.19 Bluegill DN May 2022 182 118 0.16 0.29 0.07 0.19 Bluegill DN May 2022 175 114 0.18 0.27 <0.06 0.20 Bluegill DN May 2022 152 82 0.15 0.25 <0.05 0.18 Redbreast Sunfish DN May 2022 171 105 0.15 0.43 0.07 0.22 Largemouth Bass DN May 2022 441 1156 0.26 0.25 0.25 0.21 Largemouth Bass DN May 2022 468 1447 0.24 0.23 0.23 0.20 Largemouth Bass DN May 2022 444 1156 0.17 0.29 0.29 0.19 Largemouth Bass DN May 2022 425 1109 0.17 0.28 0.17 0.20 Largemouth Bass DN May 2022 340 539 0.17 0.30 0.10 0.20 Largemouth Bass DN May 2022 402 960 0.20 0.25 0.09 0.21 A-4