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NCS000546_MRO Copy MONITORING REPORT_20210226Allen Steam Station f DUKE vi L. E N E R G7YO �y �r °°- `d�a�l �3 February 24, 2021°<;j 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 253 Plant Allen Rd. Belmont, NC 28012 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 are attached. The samples collected are required monthly due to Tier Two or Tier Three Status. The period for sampling ended January 31, 2021. Samples were collected for the period at outfalls SW007, SW010, SW016 and SW018. Samples were collected on January 25, 2021. The laboratory analysis results were received on February 9, 2021. Duke Energy has performed the steps required by the Tier II and Tier III for these outfalls. There was no sample collected at outfalls SW001, SW009, SW013-10, SW013-13 and SW020 for the period, due to No Qualifying Flow condition. Outfalls SW008 and SW015 were sampled on January 25, 2021 and the analysis results are included on this DMR. Analytes sampled above the benchmark values for analytical monitoring are as follows. Outfall Parameter Result I Benchmark SW007 I Zinc 0.245 m /L 10.126 m /L All values reported on the attached reports are dependent on the accuracy of approved analytical methods used to measure parameters. Please direct any correspondence or questions concerning the Allen Steam Station NPDES Storm Water Program to Elizabeth Glenn (980) 373-0530 or Randy Gantt (704) 829-2587. Yours truly, Rick R. Roper, GerSeral Manager III Allen Steam Station Duke Energy Carolinas, LLC Allen Steam Station 4DUKE ENERGY. Attachments bc: w/attachment Elizabeth Glenn UPS Tracking: 1Z X67 601 42 9078 7309 Duke Energy 253 Plant Allen Rd. Belmont, NC 28012 O A "OI 0 0 0 z z E a )EIJAu I ty Sectiu, ;ogional U In G rM r-� e--1 rM wa N N N N N z z zz z 44 F ^O C O O 0 0 O ®��U�3MN3�33N��3� (� 6Lr 6�r faa G=a Z Z ec W b 0 4^�,�- do d O✓dd' 00 � a � z z O� N z aJ >, c c �tnM M n tn@,E n e c M rl wb 33333333333t oz �rcnQncrU�cruncrcr u W O