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NCS000580_MONITORING INFO_20190731STORMWATER DIVISION CODING SHEET NCS PERMITS PERMIT NO. / � D � �� ✓ o v DOC TYPE [I FINAL PERMIT t MONITORING REPORTS ❑ APPLICATION ❑ COMPLIANCE ❑ OTHER DOC DATE I( ❑ D, I o'] YYYYMMDD DUKE ENERGY, PROGRESS File: Mayo 12520-R NC Department of Environmental Quality Division of Water Quality ATTENTION: Central Files 1617 Mail Service Center Raleigh, North Carolina 27699-1617 July 25, 2019 Mayo Steam Plant Duke Energy Progress 10660 Boston Road Roxboro, NC 27574 Subject: 15A N. C. Admin. Code 213 .0506 Mayo Electric Generating Plant National Pollutant Discharge Elimination System Stormwater Permit NCS000580 Stormwater Discharge Outfalls 002, 006A and 010 Monitoring Report Dear Sir or Madam: In accordance with Part III. Section E2 of NPDES Stormwater Permit Number NCS000580, enclosed is the year 3, period 2, 2019 Stormwater Discharge monitoring report for Outfalis 002, 006A and 010 for Duke Energy Progress, LLC. - NPDES Stormwater Permit Number NCS000580. I certify,, ittitle r penalty of Icm% that this docannent and all attachments were prepared under m1' direction or supervision in accordance with a system designed to assure that alrtalifted personnel properly ,gather and embiate the information submitted. Based on mar inquiry of the person or persons who manage the system, or those persons directly responsible forgathering the itformation, the information sttbrrtitted is, to the hest of my knowledge cartd belief, true, accurate, and complete. I arm aware that there are significant penalties for submitting false information, including the possibility of fumes and imprisonment for knowing violations. Please contact Ms. Lori Tollie at (336) 854-4916 if there are any questions concerning the data in this submittal. Sincerely, Tom Copolo- Manager Mayo Electric Generating Plant RECEIVE 0 Enclosures JUL 31 Z019 LPW/lpw EN } RSECTION STORNIWATER DISCHARGE OUTFALL (SDO) MONITORING REPORT Permit Number: NCS000580 SAMPLES COLLECTED DURING CALENDAR YEAR: 2019 (This monitoring report shall be received by the Division no later than 30 days from the date the facility receives the sampling results from the laboratory.) FACILITY NAME Mayo Electric Steam Plant PERSON COLLECTING SAI7PLE(S) Joseph Heath Slade CERTIFIED LABORATORY(S) Duke, Shealv Lab# 248 & 329 _Mayo Plant Lab Lab #_5064� Part A: Specific Monitoring Requirements COUNTY Person PHONE NO. (336) 597-7398 SIGNATURE OF PERMITTEE OR DESIGNEE REQUIRED ON PAGE 3. Outfall No. Date Sample Collected 00400 39516 01119 00981 7I901 01092 00530 Total Rainfall° pH' PCBs Copper' Total Selenium Total Mercury- Total Zinc Total TSS Non -Polar Oil & Grease mo/dd/ yr inches I Standard m m m m MeA m Benchmark 6-9 Detected 0.010 0.056 N/Az 0.126 100 15 002 06/18/19@ 19:30 1.89 7.05 ND <0.40 0.0568 0.00117 0.0000699 0.137 1300 ND<5 006A 06/18/19@18:05 1.89 See Comment 010 06/18/19@17:45 1.89 6.18 0.00511 <0.001 0.000021 0.016 89 ND<5 Outfall Additional Priority Pollutant Metals5 00999 01079 00978 00998 01113 01118 01074 01114 01268 00982 No. Boron' Ag' As Be Cd' Cr' Ni' Ph' Sh TV mg/1 mg/I mg/I mg/1 mg/1 mg/l mg/I mg/I mg/1 mg/l Benchmark N/A(monitor only) 0.0003 0.34 0.065 0.003 0.9 0.335 0.075 0.09 NIA (monitor only) 002 <0.05 <0.0002 <0.005 0.00101 <0.001 0.0602 0.0301 0.0191 <0.005 <0.0002 006A 010 <0.05 0.0002 <0.001 <0.001 <0.001 0.00534 0.00259 0.00207 <0.001 <0.0002 Form SWU-247, last revised 21212012 Page I of 3 Footnotes.: Permit # NC5000580 [Part II Pa�.;e 7 of 35� 4. For each sampled measureable storm event, the total precipitation must be recorded. An on -site rain gauge is required. Where isolated sites are unmanned for extended periods of time, a local rain gauge reading may be substituted for an on -site reading. S. These parameters shall be monitored only if coal or coal ash is transported through the drainage areas of these outfalls during the semi-annual monitoring period in Table 2. Footnotes: Permit # NCS000580 Part II Pa eY9 of 15 1. Hardness- dependent Benchmark based on translation of dissolved value into total recoverable with an assumed hardness of 25 mg/l and a total suspended solids (TSS) concentration of 10 mg/I. 2. Values above the North Carolina water quality standard for mercury (12 ng/1) should be noted on the DMR but do not trigger Tier responses. Concentrations infield blanks or method blanks associated with the sample may be subtracted from the results far that sample, as long as all documentation of the adjustment is provided with the DMR. 3. If pH values outside this range are recorded in sampled stormwater discharges, but ambient precipitation pH levels are lower, then the lower threshold of this benchmark range is the pH of the precipitation (within instrument accuracy) instead of 6 S.U. Readings from an on -site or local rain gauge (or local precipitation data) must be documented to demonstrate background concentrations were below the benchmark pH range of 6- 9. Does this facility perform Vehicle Maintenance Activities using more than 55 gallons of new motor oil per month? _yes _X_no (if yes, complete Part B) Part B: Vehicle Maintenance Activity Monitoring Requirements Outfall No. Date Sample Collected 50050 00556 00530 00400 Total Flow (if applicable) Total Rainfall Oil & Grease (if appl.) Non -polar - O&G/TPH (Method 1664 SGT-HEM), if appl. Total Suspended Solids pH New Motor Oil Usage moldd/ r MG inches m m unit gallmo Form SWU-247. last revised 21212012 Page 2 of 3 Comments: Footnote 2: Permit # NCS000580 (Part It Page 9 of 15) • Only visual inspection was required for 006A. + Mercury value for outfall 002on 06/18/19 was 69.9 ng/I which is over the North Carolina water quality standard for Mercury of 12 ng/1. + Mercury value for outfall 010 on 06/18/19 was 21.0 ng/I which is over the North Carolina water quality standard for Mercury of 12 ng/l. • Revision made to permit to include new 002. Permit was amended and signed on 3/21/19. STORM EVENT CHARACTERISTICS: Date _06/18/2019-06/19/2019 Total Event Precipitation (inches): 1.89 Event Duration (hours): ____I5, (only if applicable — see permit.) (if more than one storm event was sampled) Date Total Event Precipitation (inches): Event Duration (hours): (only if applicable — see permit.) ,'Flail Original and one copy to: Division of Water Quality Attn: Central Files 1617 Mail Service Center Raleigh, North Carolina 27699-1617 "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 fines and imprisonment for knowing violations." a -) I& q (Date) Form SWU-247. last revised 21212012 Page 3 of 3 DUKE ENERGY® PROGRESS File: Mayo 12520-R July 25, 2019 NC Department of Environmental Quality Division of Water Quality ATTENTION: Central Files 1617 Mail Service Center Raleigh, North Carolina 27699-1617 Mayo Steam Plant Duke Energy Progress 10660 Boston Road Roxboro, NC 27574 Subject: 15A N. C. Admin. Code 2I3 .0506 Mayo Electric Generating Plant National Pollutant Discharge Elimination System Stormwater Permit NCS000580 Stormwater Discharge Outfalls 002, 006A and 010 Monitoring Report Dear Sir or Madam: In accordance with Part II1. Section E2 of NPDES Stormwater Permit Number NCS000580, enclosed is the year 3, period 2, 2019 Stormwater Discharge monitoring report for Outfalls 002, 006A and 010 for Duke Energy Progress, LLC. - NPDES Stormwater Permit Number NCS000580. 1 certify, widerpetialty of law, that this document curd all attachments were prepared rrirder my direction or supen'isiort in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on mr inquire of the person or persons who manage the system, or those persons directly responsible forgathering the infornration, the information submitted is, to the hest of mrt' knowledge and belief, true, accurate, and complete. f am airare that there are significant penalties for submitting false irlfornrcrtion, including the possibility of fines and imprisonment for knowing violations. Please contact Ms. Lori Tollie at (336) 854-4916 if there are any questions concerning the data in this submittal. Enclosures LPW/lpw t Sincerely, Tom Copolo- Manager Mayo Electric Generating Plant File: Mayo 12520-R July 25, 2019 N Deptrtment of Environmental Quality Division f Water Quality A EN ION: Central Files 16 7 Mail Service Center Ra eigh, North Carolina 27699-1617 Subject: 15A N. C. Admin. Code 2B .0506 Mayo Electric Generating Plant National Pollutant Discharge Elimination System (NPDES) Number NC0038377 Discharge Monitoring Report (DMR) cc: Ms. Lori Tollie (w/enclosures) Ms. Keeley McCormick (wlenclosures) Ms. Tina Woodward (wlenclosures) Lab STORMWATER DISCHARGE OUTFALL (SDO) MONITORING REPORT Permit Number: NCS000580 FACILITY NAME Mayo Electric Steam Plant PERSON COLLECTING SAi41PLE(S) ,Joseph Heath Slade CERTIFIED LABORATORY(S) Duke, Shealv Lab# 248 & 329 _Mayo Plant Lah Lab #_5064_ Part A. Specific Monitoring Requirements SAMPLES COLLECTED DURING CALENDAR YEAR: 2019 (This monitoring report shall be received by the Division no later than 30 days from the date the facility receives the sampling results from the laboratory.) COUNTY Person PHONE NO. (336) 597-7398 SIGNATURE OF PERMITTEE OR DESIGNEE REQUIRED ON PAGE 3. Outfall No. Date Sample Collected 00400 39516 01119 . 00981 71901 01092 00530 Tow Rainfall' pH` PCBs Copped Total Selenium Total Mercury= Total Zinc` Total TSS Non -Polar Oil & Grease mo/dd/vr inches Standard ggil m■ m m m mg/l m Benchmark 6-9 Detected 0.010 0.056 N/A'` 0.126 100 15 002 06/18/19@ 19:30 1.89 7.05 ND <0.40 0.0568 0.00117 0.0000699 0.137 1300 ND<5 006A 06/18/19@18:05 1.89 See Comment 010 06/18/19@17.45 1.89 6.18 0.1111511 <o.0U1 0.000021 0.016 89 ND<5 Outfall - Additional Priority Pollutant Metals{ 00999 01079 00978 00998 01113 01118 01074 01114 01268 00982 No. Boron' Ag' As Be Cd' Cr' Nil Phl. Sb TV mg/l mg/l mg/1 mg/l mgfl mg/I mg/l mg/l mg/l mg/i Benchmark N/A(monitor only) 0.0003 0.34 0.065 0.003 0.9 0.335 0.075 0.09 N/A (monitor only) 002 <0.05 <0.0002 <0.005 0.00101 <0.001 0.0602 0.0301 0.0191 <0.005 <0.0002 006A 010 <0.05 <0.0002 <0.001 <0.00I <0.001 0.00534 1 0.00259 0.00207 <01.0111 <0.0002 0 Form SWU-247, Iasi revised 212/Z012 Pw�e I of 3 footncitcs::Permi[4JM' S0005S 6(Paroi_LParc 7Zo 71 j 4. For each sampled measureable storm event, the total precipitation must he recorded. An on -site rain gauge is required. Where isolated sites are unmanned for extended periods of time, a local rain gauge reading may be substituted for an on -site reading. S. These parameters shall be monitored only if coal or coal ash is transported through the drainage areas of these outfalls during the semi-annual monitoring period in Table 2. FootnoW.;JF;r rmi`t:#'NCS00059-6 Pah"Ii' age of 15�j 1. Hardness- dependent. Benchmark based on translation of dissolved value into total recoverable with an assumed hardness of 2S mg/I and a total suspended solids (TSS) concentration of 10 mg/l. 2. Values above the [forth Carolina water quality standard for mercury (12 ng/1) should be noted on the DMR but do not trigger Tier responses. Concentrations infield blanks or method blanks associated with the sample may be subtracted from the results for that sample, as long as all documentation of the adjustment is provided with the DMR. 3. If pH values outside this range are recorded in sampled stormwater discharges, but ambient precipitation pH levels are lower, then the lower threshold'of this benchmark range is the pH of the precipitation (within instrument accuracy) instead of 6 S.U. Readings from an on -site or local rain gauge (or local precipitation data) must be documented to demonstrate background concentrations were below the benchmark pH range of 6- 9. Does this facility perform Vehicle Maintenance Activities using more than 55 gallons of new motor oil per month'? _yes _X_no (if yes, complete Part B) Part B: Vehicle Maintenance Activitv Monitorine Reauirements Outfall ` • - - •- -Date, 'Sample: ;.Clet - - •50054?' 00556' k011530 00400' .TotalFlow i '• ;Total ' Rainfal L; a - - Qil&Grease r(if appl:)= , - - y,'•SGT=H)Ek'I);,if• No -polar" .Q&C/TPH, (Method:.1664= a l: Total Suspended:";oe' .Solids: .. pl1 ". . - New•Motor•No.. . — �mo/dd/ • )r CMG - finches' - , m m unit' aUmo' . Form SWU-247, last revised 21212012 Page 2 of 3 Comments: Footnote 2: Permit # NCS000580 (Part I1 Page 9 of 1-) • Only Visual inspection was required Im 006A. • Mercury value for outfall 002on 06/18/19 was 69.9 ngll which is over the North Carolina water quality standard for Mercury of 1.2 ng/l. • Mercury value for outfal] 010 on 06/18/19 was 2l.0 n,�/1 which is over the North Carolina water quality standard for Mercury of 12 ng/l. • Revision made to Permit to include new 002, Permit was amended and si+oned on 3/11119. i STORM EVENT CHARACTERISTICS: Mail Original and one copy to: Division oI' Water Quality Date 06/18/2019-06/19/2019 Attn: Central Files Total Event Precipitation (inches): I.89 1617 Mail Service Center Event Duration (hours): _15__ (only ifapplicable — sec permit.) Raleigh, North Carolina 27699-1617 (if more than one storm event was sampled) Date Total Event Precipitation (inches): Event Duration (hours): (only if applicable — see permit,) "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 fines and imprisonment for knowing violations." (Signature of P tee) (Date) Form SWU-247, Iasi revised 21212012 Page 3 of 3