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NCS000546_MONITORING REPORT_20210604DUKE rt EN` June 3, 2021 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 Allen Steam Station 253 Plant Allen Rd. Belmont, NC 28012 704 829-2587 N 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 May 31, 2021. Samples were collected for the period at outfalls SW007, SW009, SW010, SW016, SW018 and SW020 on May 3, 2021. The laboratory analysis results were received on May 14, 2021. Duke Energy has performed the steps required by the Tier II and Tier III for these outfalls. There were no samples collected at outfalls SW001, SW013-10 and SW013- 13 for the period, due to No Qualifying Flow condition. Analytes sampled above the benchmark values for analytical monitoring are as follows. Outfall Parameter Result Benchmark SW016 Zinc 0.243 mg/L 0.126 mg/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, General Manager III Allen Steam Station Duke Energy Carolinas, LLC Attachments bc: w/attachment Elizabeth Glenn UPS Tracking: 1Z X67 601 42 9439 5403 oo tn fq � N e� 00 O H T ro U O U F? 0 0 0 0 0 0 i A oP�Ey o00 0®® O C .. 0 0 0 0 0 0 ov v v v v v N N N t�"-I to O O 0 000 o v v o z zz oo®H�000 tz O O O W f� Fes, O OO ' y •- In C \ c z P Haoknmmoo►U�49Ili zo0®zz000 zzzzzzzzz A V M M M M M M 5izztntntn O M O O O ri ri � Pa r-1 N oz 333333333 En. cn En En En En En En N O � � O am- 0 N 0 o G 0 p N N o 0 0 o v 0 N N N N N 0 0 0 O O O In O O 0 0 0 O O O ®oo oo 0v v v H tifqH d• M t� r-I 'IT y 0 0 0 0 0 0 ova ° E voo 000 G 0 a � c 0 0 0 0 0 0 ov v v v v v N N N O N N N O !�- N Q Q Nkn O ti ='ol�000000 oaa� v OO vo O xi r7r" xi W O 44 `� H p O O O p 0 oz vooE.,E. o vo 0 00 w w w a O O en en N y Ar 0000 N oowwoo0 M N C-0 0 0 0 o 000zz000 0 0 0 0 0 >0 _ A(q O N M R°.a000��0CC Oz o U° z v V o zz o 0 0 M M M M M M O M r+t�o�oc%�r��0000 333333333 oz y N N N tn 0 00 q W W W I � F H CC �+ Cxa O V i�r Hc� M V O G=r OO w W Nen O m GT, w W w >4 >4 o °N �w °'" �Oeq a en tn ao00en�or as 'IT i 4NMt44z0614t-z O N N N N N N o en O O C O O rw M r-� M ri IO rM 00 PI O N 0 0 0 0 0 0 0 M cn Lt a i. y V O � z O bA 0 o O [ay O zo..� a O w ® v a��+ w V Ha � v ra `o v RO. V V dJ O Oz