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NCS000546_MONITORING REPORT_20201120� DUKE November 11, 2020 NCDEQ, Mooresville Regional Office Attn: DEMLR Stormwater Program 610 East Center Ave., Suite 301 Mooresville, N.C. 28115 Subject: Duke Energy Carolinas, LLC NPDES Storm Water Discharge Monitoring Report for: Allen Steam Station — NCS000546 — Gaston County Duke Energy Carolinas, LLC Allen Steam Station 253 Plant Allen Rd. Belmont, NC 28012 704 829-2587 RFC��V�D MOP 9 M"resIyC) 'yG9 �s , OW of, - In accordance with Part III, E(2) of the above referenced NPDES Storm Water permit, the original and one copy of the monthly monitoring reports for the outfalls that have been classified as Tier 2 or Tier 3 and are subject to monthly sampling, are attached. The period for sampling ended on October 31, 2020. Enclosed is the DMR for outfalls SW001, SW007, SW009, SW010, SW013-10, SW013-13, SW016, SW018 and SW020.There were no samples collected from these outfalls and are listed as "No Qualifying Flow" for the sampling period. This was due to lack of qualifying rainfall events, nighttime events or inclement weather. Please direct any correspondence or questions concerning the Allen Steam Station NPDES Storm Water Program to Elizabeth Glenn at (980) 373-0530. Yo truly, Rick R. Roper, General Manager III Allen Steam Station Duke Energy Carolinas, LLC Attachments bc: w/attachment: Elizabeth Glenn UPS Tracking: 1 Z X67 601 24 9451 0473 STORMWATER DISCHARGE OUTFALL (SDO) MONITORING REPORT Permit Number NCS000546 FACILITY NAME Allen Steam Station o' o 5 O PERSON COLLECTING SAMPLE(S) NA n ` o CERTIFIED LABORATORY(S) Duke Energy Carolinas, LC Lab # 248 Pace Analytical Services Lab #329 c m =' O'er Part A: Specific Monitoring Requirements SAMPLES COLLECTED DURING CALENDAR YEAR: 2020 (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.) CD III COUNTY Gaston (7 PHONE NO.( 704 ) 8604945 v m 0 N m SIGNATURE OF PERMITTEE OR DESIGNEE o REOUIRED ON PAGE 3. Outfall Date 50050 00400 01077 01002 01022 01012 01027 No. Sample Collected Total Flow (if app.) Total Rainfall pH Silver, Total (as A) Arsenic, Total (as As) Boron, Total (as B) Beryllium, Total (as Be) Cadmium, Total (as Cd) mo/dd/yr MG inches m m mg1L m m SW001 N/A N/A NO QUALIFYING FLOW FOR THE MONTH OF OCTOBER 2020 SW007 N/A N/A NO QUALIFYING FLOW FOR THE MONTH OF OCTOBER 2020 SW009 N/A N/A NO QUALIFYING FLOW FOR THE MONTH OF OCTOBER 2020 SWO10 N/A I N/A NO QUALIFYING FLOW FOR THE MONTH OF OCTOBER 2020 SW013-10 N/A N/A NO QUALIFYING FLOW FOR THE MONTH OF OCTOBER 2020 SW013-13 N/A N/A NO QUALIFYING FLOW FOR THE MONTH OF OCTOBER 2020 SW016 N/A N/A NO QUALIFYING FLOW FOR THE MONTH OF OCTOBER 2020 SW018 N/A N/A NO QUALIFYING FLOW FOR THE MONTH OF OCTOBER 2020 SW020 N/A N/A NO QUALIFYING FLOW FOR THE MONTH OF OCTOBER 2020 Outfall Date 01034 01042 01067 01051 01097 01147 01059 01092 No. Sample Collected Chromium, total (as Cr) Copper, Total (as Cu) Nickel, Total (as Ni) Lead, Total (as Ph) Antimony, Total (as Sb) Selenium, Total (as Se) Thallium, (Total as TI) Zinc, Total (as Zn) mo/dd/yr mg/L mg/L m mgtL mgtL mg1L m m SWO01 N/A NO QUALIFYING FLOW FOR THE MONTH OF OCTOBER 2020 SW007 N/A NO QUALIFYING FLOW FOR THE MONTH OF OCTOBER 2020 SW009 1 N/A NO QUALIFYING FLOW FOR THE MONTH OF OCTOBER 2020 SWO10 N/A NO QUALIFYING FLOW FOR THE MONTH OF OCTOBER 2020 SWO13-10 N/A NO QUALIFYING FLOW FOR THE MONTH OF OCTOBER 2020 SWO13-13 N/A NO QUALIFYING FLOW FOR THE MONTH OF OCTOBER 2020 SWO16 N/A NO QUALIFYING FLOW FOR THE MONTH OF OCTOBER 2020 SW018 N/A NO QUALIFYING FLOW FOR THE MONTH OF OCTOBER 2020 SW020 N/A NO QUALIFYING FLOW FOR THE MONTH OF OCTOBER 2020 Permit Number NCS000546 Form SWU-247, last revised 611212015 Page 1 of 3 Outfall No. Date Sample Collected 71900 C0530 00556 Mercury, Total, Method 1631E Solids, Total Suspended — Concentration Oil & Grease mo/dd/yr mg/L I mg/L m SWO01 N/A NO QUALIFYING FLOW FOR THE MONTH OF OCTOBER 2020 SWO07 N/A NO QUALIFYING FLOW FOR THE MONTH OF OCTOBER 2020 SWO09 N/A NO QUALIFYING FLOW FOR THE MONTH OF OCTOBER 2020 SWO10 N/A NO QUALIFYING FLOW FOR THE MONTH OF OCTOBER 2020 SWO13-10 N/A NO QUALIFYING FLOW FOR THE MONTH OF OCTOBER 2020 SWO13-13 N/A NO QUALIFYING FLOW FOR THE MONTH OF OCTOBER 2020 SWO16 N/A NO QUALIFYING FLOW FOR THE MONTH OF OCTOBER 2020 SWO18 N/A NO QUALIFYING FLOW FOR THE MONTH OF OCTOBER 2020 SW020 N/A NO QUALIFYING FLOW FOR THE MONTH OF OCTOBER 2020 Does this facility perform Vehicle Maintenance Activities using more than 55 gallons of new motor oil per month? Oyes eno (if yes, complete Part B) Part B: Vehicle Maintenance Activitv Monitorine Reauirements 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 mo/dd/yr MG inches mg/l mg/l unit gal/mo Permit Number NCS000546 Form SWU-247, last revised 611212015 Page 2of3 STORM EVENT CHARACTERISTICS: Date NA Totai Event Precipitation (inches): NA Event Duration (hours): (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.) Mail Original and one copy to: Division of Energy Mineral and Land Resources 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." ll�l��2v (Date) Permit Number NCS000546 Form SWU-247, last revised 611212015 Page 3 of 3