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NCS000580_MONITORING INFO_20191220STORMWATER DIVISION CODING SHEET NCS PERMITS PERMIT NO. /V LS U o o S DOC TYPE ❑FINAL PERMIT MONITORING REPORTS ❑ APPLICATION ❑ COMPLIANCE ❑ OTHER DOC DATE ❑ YYYYMMDD KE E'ERGY, PROGRESS File: Mayo 12520-R NC 11gpartment of Environmental Quality Division of Water Quality ATTE TION: Central Files 1617 Plail Service Center Raleig i, North Carolina 27699-1617 ' Z'V Z ...d December 16, 2019 DEC 2 0 2�19 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 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, November 2019 Stormwater Discharge monitoring report for Outfalls 002 and 010 for Duke Energy Progress, LLC. - NPDES Stormwater Permit Number NCS000580. To note, Outfalls 002 and 010 are in tiered status. I certify, under penalty of law, that this document and all attachments nvere prepared under my direction or supervision in accordance witlr a system designed to assure that qualified personnel properly' gather and evaluate the information subinitted. Based on nny inquiry, of the person or persons svho manage the system, or those persons directly responsible fiar gathering the info•nnation, the information subnnitted is, try the best of nny knovleclge and belief, true, accurate, and complete. 1 am aware that there are significant penalties for submitting false information, 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. Sincerely, �r Toni Copolo- Manager Mayo Electric Generating Plant Enclosures LPW/lpw r STORMWATER 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 COUNTY Person PERSON COLLECTING SAMPLE(S) John Arthur Cole PHONE NO. (336) 597-7398 CERTIFIED LABORATORY(S) Duke, Shealy Lab# 248 & 329 _Mayo Plant Lab Lab #_5064 SIGNATURE OF PERMITTEE OR DESIGNEE REQUIRED ON PAGE 3. Part A: Specific Monitoring Requirements OutfalL ; _ No Date. " Sample Collected 00400- 39516ti . .. ' '01119.: 00981"`= , , 71901' 01092 . -0053Q:.: Xotal ' Rail' fa114 -W IPCBs . �:Co er' .PP ,- Total' „ �Selenmm ;Total .'.Mercury z Y Total ` Zinc- �� „Total TSS -Non-Polar`. F. <. Oit &Grease mo/dd/yr. inches Standard : m =m m Y to m Fm Benchmark 6-9 Detected 0.010 0.056 NIAI 0.126 100 15 002 11/12/19 @ 14:35 0.54 7.38 ND<0.40 0.00342 <0.001 0.00000322 0.013 9.3 ND<5.0 010 11/12/19 @ 13:10 0.54 6.39 Not Tested 0.00460 <0.001 0.00000550 0.008 15 ND<5.0 dditional'Priority;P611utanYMetals' A . 00999;: ;. 01079: . 00978 p00998 : 01113 01ll8, , 01074f, t .__:OIll4" `01268. ` 00982 . No 'BoronS .- Age As Be Cd' Cr!? N�' Vb' Sb- -_Tl' 0.00000 mg/l ♦ ; mg/l. mom' , mg/1:2 : mg/l Q mg/l x . m y.mgtl In m 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 <0.001 <0.001 <0.001 0.00168 <0.001 <0.001 <0.001 <0.0002 010 <0.05 <0.0002 <0.001 <0.001 <0.001 0.00236 0.00196 <0.001 <0.001 <0.0002 Form SWU-247, last revised 2/212012 Page I of 3 Footnotes: Permit # NCS000580 (Part IIrt II (Part 7 of 15) 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 ll.Page-9_of 15 ) 1. Hardness- dependent. Benchmark based on translation of dissolved value into total recoverable with an assumed hardness of 25 mg/I and a total suspended solids (TSS) concentration of 10 mg/l. 2. Values above the North Carolina water quality standard for mercury (12 ng/1) should be noted on the DM R but do not trigger Tier responses. Concentrations infield blanks or method blanks associated with the sample may be subtracted from the results for thatsample, 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 Total Suspended Solids pH New Motor Oil Usage d moldd/ r . , tV1G.; inches. in - m unit allmo Form SWU-247. last revised 2/212012 Pace 2 of 3 Comments: • Outfall 010: Tier One • Outfall 002. Tier Two STORM EVENT CHARACTERISTICS: Date: 11/12/2019 Total Event Precipitation (inches): 0.54 Event Duration (hours): n hours 20 minutes (only if applicahle — see permit.) (if more than one storm event was sampled) Date Total Event Precipitation (inches): Event Duration (hours): (only if applicable — see permit.) Mail 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." (Signature of Ia-%tr hi (Date) Form SWU-247, lust revised 21212012 Page 3 of 3