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HomeMy WebLinkAboutNC0026271_Fact Sheet_20200615DocuSign Envelope ID:4932EFD0-D72B-481D-8A64-B9BC9D977278 DENR / DWR / NPDES EXPEDITED FACT SHEET - NPDES PERMIT DEVELOPMENT NPDES Permit NCO026271 Emily DelDuco, Compliance & Expedited Permitting Unit / 919-707-9125 17 March 2020 Facility Information Applicant/Facility Name Town of Taylorsville WWTP Applicant Address 67 Main Avenue Drive, Taylorsville, NC 28681 Facility Address 344 Minnagan Lane, Taylorsville, NC 28681 Permitted Flow (MGD) 0.830 MGD Type of Waste 70% Domestic, 30% Industrial Facility Class Grade III, Minor Renewal County Alexander Permit Status Renewal Regional Office MRO Stream Characteristics Receiving Stream Lower Little River Stream Classification WS-IV Stream Segment [11-69-(5.5)] Drainage basin Catawba Summer 7Q10 (cfs) 14.4 Subbasin 03-08-32 Winter 7Q 10 (cfs) 25.3 30Q2 (cfs) 35.2 303(d) Listed Not Listed Average Flow (cfs) 84.3 State Grid D14NW IWC (%) 8.2% USGS Topo Quad Taylorsville, NC Division Records and Renewal Application: The Division received Permittee's timely request to renew (Standard Form 2A). Although BIMS indicate a complex wastestream [-70 Domestic /-30% industrial], Taylorsville WWTP does not have a pretreatment program. Stream — Discharge from WTP for Outfall 001 is into Lower Little River [Stream Segment 11-29-(5.5)]. The segment is not currently listed as impaired in the 2018 North Carolina 303(d) List. This segment is currently classified as WS-IV. Compliance History: No enforcements since 2010. One incident in 2014: digester force main cap failure caused unauthorized bypass. Daily Discharge Summary (parameter code 50050 - MGD) DAILY DISCHARGE SUMMARY (MGD) YEAR Mean Minimum Maximum N 2016 0.42 0.21 1.40 357 2017 0.43 0.14 1.22 357 2018 0.47 0.21 1.67 354 2019 0.41 0.27 1.40 355 [ Maximum Monthly average flow (CAMONAVG) in past 36 months (Jan 2017-Dec2019) = 0.607 MGD Fact Sheet Renewal -- NPDES NCO026271 Page 1 DocuSign Envelope ID:4932EFD0-D72B-481D-8A64-B9BC9D977278 DMR Summary Jan 2016 - Dec 2020 Note: permittee reported copper and zinc in ug/L, but lap reports show that the correct unit is mg/L SAMPLE LOCATION: EFFLUENT PARAMETER Mean Minimum Maximum N 00010 - TEMPERATURE, WATER DEG. CENTIGRADE 19.96 10.00 29.00 626 00094 - CONDUCTIVITY 636.20 279.00 974.00 626 00400 - PH 6.77 6.00 7.90 626 00720 - CYANIDE, TOTAL (AS CN) 0.01 0.01 0.01 16 00940 - CHLORIDE (AS CL) 64.90 37.50 85.00 96 01042 - COPPER, TOTAL (AS CU) 0.02 0.01 0.09 96 01092 - ZINC, TOTAL (AS ZN) 0.15 0.01 0.57 96 31616 - COLIFORM, FECAL MF, MFC BROTH, 44.5 C 1.00 360.00 626 50050 - FLOW, IN CONDUIT OR THRU TREATMENT PLANT 0.43 0.14 1.67 1423 50060 - CHLORINE, TOTAL RESIDUAL 21.89 19.00 25.00 626 C0310 - BOD, 5-DAY (20 DEG. C) - CONCENTRATION 4.40 2.00 28.80 626 C0530 - SOLIDS, TOTAL SUSPENDED - CONCENTRATION 9.08 2.50 42.00 626 C0600 - NITROGEN, TOTAL - CONCENTRATION 15.17 6.30 23.40 16 C0610 - NITROGEN, AMMONIA TOTAL (AS N) - 0.89 0.20 10.40 626 CONCENTRATION C0665 - PHOSPHORUS, TOTAL (AS P) - CONCENTRATION 3.81 2.77 4.63 16 TGP3B - PASS/FAIL STATIC RENEWAL 7DAY CHRONIC 1.00 1.00 1.00 16 CERIODAPHNIA SAMPLE LOCATION: INFLUENT * PARAMETER Mean Minimum Maximum N C0310 - BOD, 5-DAY (20 DEG. C) - CONCENTRATION 458.88 173.00 1820.00 626 C0530 - SOLIDS, TOTAL SUSPENDED - CONCENTRATION 510.28 54.00 7800.00 626 *>85% removal achieved at effluent Toxicity -All tests this permit cycle were passed. In stream monitoring - No instream monitoring is currently required. The level B model for this facility indicates that secondary limits will protect the receiving stream and no instream monitoring was recommended. RPA - A Reasonable Potential Analysis (RPA) was conducted on Copper, Chlorides, Cyanide, & Zinc effluent parameters data because Discharge Monitoring Reports (DMRs) reported concentration above method -detection levels (MDLs) for the past four and one half (4) years (Jan 2016 -December 2019). [See attached RPA summary sheets.] • Zinc, cyanide, and chlorides showed no reasonable potential to violate state water quality standards (WQS). Monitoring for these parameters has been removed from the permit. • Copper showed no reasonable potential to violate state water quality standards (WQS). However, since the maximum predicted Copper concentrations based on current data is greater than 50% of the allowable concentration, quarterly monitoring will remain in this permit. Changes to previous permit: • Regulatory citations for permit requirements have been added throughout the permit. • The language in section A.(3.) has been updated to be consistent with the finalization of federal requirements for electronic reporting. • Winter ammonia limits added • Review of eDMR data showed no potential for chlorides, zinc, and cyanide to exceed water quality standards. Monitoring for these parameters has been removed from the permit. Fact Sheet Renewal -- NPDES NCO026271 Page 2 DocuSign Envelope ID:4932EFD0-D72B-481D-8A64-B9BC9D977278 Review of data also showed limited potential for copper to exceed water quality standards. The requirement to monitor for copper will remain in the permit, but monitoring frequency has been reduced to quarterly. Fact Sheet Renewal -- NPDES NCO026271 Page 3 DocuSign Envelope ID: 4932EFD0-D72B-481 D-8A64-1396C91D977278 Wnole LTTluent I oxlclty I esting an Seit Monitoring Summary Taylorsville WWTP NCO026271/001 County: Alexander Region: MRO Basin: CTB32 Jan Apr Jul Oct SOC JOC: Ceri7dPF Begin: 7/1/2015 chr lim: 8.2% NonComp: Single 7Q10: 14.4 PF: 0.83 IWC: 8.2 Freq: Q J F M A M J J A S O N 2016 Pass - - Pass - - Pass - - Pass - 2017 Pass - - Pass - - Pass - - Pass - 2018 Pass - - Pass - - Pass - - Pass - 2019 Pass - - Pass - - Pass - - Pass - 2020 Pass - - - - - - - - - - Textron, Inc. GWR WWTP NCO084662/001 County: Gaston Region: MRO Basin: CTB37 Jan Apr Jul Oct SOC JOC: Ceri7dPF Begin: 2/1/2016 chrlim:66% NonComp: Single 7Q10: 0.24 PF: 0.10 IWC: 66 Freq: Q J F M A M J J A S O N 2016 Pass - - Pass - - Pass - - Pass - 2017 Pass - - Pass - - Pass - - Pass - 2018 Pass - - Pass - - Pass - - Pass - 2019 Pass - - Pass - - Pass - - Pass - 2020 Pass - - - - - - - - - - Thomasville Furniture NCO084816/001 County: Guilford Region: WSRO Basin: CPF09 Jan Apr Jul Oct SOC JOC: Ceri7dPF Begin: 11/1/2006 chrlim:90% NonComp: Single 7Q10: 0.0 PF: 0.028 IWC: 100 Freq: Q J F M A M J J A S O N 2016 H - - H - - H - - H - 2017 H - - H - - H - - H - 2018 H - - H - - H - - H - 2019 H - - H - - H - - H - 2020 H - - - - - - - - - - Thomasville -Hamby Creek WWTP NCO024112/001 County: Davidson Region: WSRO Basin: YAD07 Feb May Aug Nov SOC JOC: Ceri7dPF Begin: 8/1/2009 Chr Iim:90% NonComp: SINGLE 70.10: 0.43 PF: 4.0 IWC: 94 Freq: Q J F M A M J J A S O N 2016 >100 Pass - - Pass - - Pass >100(P) - - Pass 2017 - Pass - - Pass - - Pass >100(P) - - Pass 2018 - Pass >100(P) - - Pass - - Pass - - Fail 2019 >100 Pass - - Pass >100(P) - - Pass Pass Pass Pass 2020 Pass Pass - - - - - - - - - Town of Burnsville WTP NCO075965/001 County: Yancey Region: ARO Basin: FRB06 Jan Apr Jul Oct SOC JOC: Ceri48PF Begin: 5/1/2016 Ceri48PF Monit. @ 9 NonComp: 7Q10: PF: IWC: Freq: Q J F M A M J J A S O N 2016 Pass - - Pass - - Pass - - Pass - 2017 Pass - - Pass - - Pass - - Pass - 2018 Pass - - Pass - - Pass - - Pass - 2019 Pass - - Pass - - Pass - - Pass - 2020 Pass - - - - - - - - - - C C G D >100 Pass C Legend: P= Fathead minnow (Pimphales oromelas), H=No Flow (facility is active), s = Split test between Certified Labs Page 104 of 117 DocuSign Envelope ID: 4932EFD0-D72B-481 D-8A64-B9BC9D977278 Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators MAXIMUM DATA POINTS = 58 REQUIRED DATA ENTRY Table 1. Proiect Information Facility Name WWTP/WTP Class NPDES Permit Outfall Flow, Qw (MGD) Receiving Stream HUC Number Stream Class ❑CHECK IF HQW OR ORW WQS Town of Taylorsville WWTP Grade III Biological WPCS NCO026271 001 0.830 Lower Little River 030501011003 WS-IV ❑Apply WS Hardness WQC 7Q10s (cfs) 7Q10w (cfs) 30Q2 (cfs) QA (cfs) 1Q10s (cfs) 14.40 25.30 35.20 84.30 11.91 _Effluent Hardness ---------------------- Upstream Hardness _Combined Hardness Chronic Combined Hardness Acute 25 mg/L (Avg) 25 mg/L (Avg) 1 --------- 25 mg I — 25 mg/L-------- Data Source(s) ❑CHECK TO APPLY MODEL Par01 Par02 Par03 Par04 Par05 Par06E Par07 Par08 Par09 Par10 Par11 Par12 Par13 Par14 Par15 Par16 Par17 Parts Par19 Par20 Par21 Par22 Par23 Par24 Table 2. Parameters of Concern Name w4s Type Chronic ModIer Acute PQL Units Arsenic Aquactic Life C 150 FW 340 ug/L Arsenic Human Health Water Supply C 10 HH/WS N/A ug/L Beryllium Aquatic Life NC 6.5 FW 65 ug/L Cadmium Aquatic Life NC 0.5899 FW 3.2396 ug/L Chlorides Aquatic Life NC 230 FW Chlorinated Phenolic Compounds Water Supply NC 1 A ug/L Total Phenolic Compounds Aquatic Life NC 300 A ug/L Chromium III Aquatic Life NC 117.7325 FW 905.0818 ug/L Chromium VI Aquatic Life NC 11 FW 16 pg/L Chromium, Total Aquatic Life NC N/A FW N/A pg/L Copper Aquatic Life NC 7.8806 FW 10.4720 ug/L Cyanide Aquatic Life NC 5 FW 22 10 ug/L Fluoride Aquatic Life NC 1,800 FW ug/L Lead Aquatic Life NC 2.9416 FW 75.4871 ug/L Mercury Aquatic Life NC 12 FW 0.5 ng/L Molybdenum Human Health NC 2000 HH ug/L Nickel Aquatic Life NC 37.2313 FW 335.2087 pg/L Nickel Water Supply NC 25.0000 WS N/A pg/L Selenium Aquatic Life NC 5 FW 56 ug/L Silver Aquatic Life NC 0.06 FW 0.2964 ug/L Zinc Aquatic Life NC 126.7335 FW 125.7052 ug/L 26271 9595 Final FW RPA w_upstream avg data, input 3/25/2020 DocuSign Envelope ID: 4932EFD0-D72B-481 D-8A64-B9BC9D977278 REASONABLE POTENTIAL ANALYSIS 111 H2 Use "PASTE SPECIAL Use "PASTE SPECIAL Effluent Hardness Values" then "COPY" Upstream Hardness Values" then "COPY" . Maximum data . Maximum data points = 58 points = 58 Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results 1 25 25 Std Dev. N/A 1 25 25 Std Dev. N/A 2 Mean 25.0000 2 Mean 25.0000 3 C.V. 0.0000 3 C.V. 0.0000 4 n 1 4 n 1 5 10th Per value 25.00 mg/L 5 10th Per value 25.00 mg/L 6 Average Value 25.00 mg/L 6 Average Value 25.00 mg/L 7 Max. Value 25.00 mg/L 7 Max. Value 25.00 mg/L 8 8 9 9 10 10 11 11 12 12 13 13 14 14 15 15 16 16 17 17 18 18 19 19 20 20 21 21 22 22 23 23 24 24 25 25 26 26 27 27 28 28 29 29 30 30 31 31 32 32 33 33 34 34 35 35 36 36 37 37 38 38 39 39 40 40 41 41 42 42 43 43 44 44 45 45 46 46 47 47 48 48 49 49 50 50 51 51 52 52 53 53 54 54 55 55 56 56 57 57 58 58 26271 9595 Final FW RPA w_upstream avg data, data -3- 3/25/2020 DocuSign Envelope ID:4932EFD0-D72B-481D-8A64-B9BC9D977278 REASONABLE POTENTIAL ANALYSIS Par05 Chlorides Use "PASTE SPECIAL- Values" then "COPY". Pall Use "PASTE SF Copper Values" then "i Maximum data points = . Maximum c points = 5 58 Date Data BDL=1/2DL Results Date Data BDL=1/2DL Results 1 8/1/2017 67 67 Std Dev. 10.7723 1 8/1/2017 39 39 Std Dev. 11.7458 2 8/14/2017 63 63 Mean 65.9 2 8/14/2017 34 34 Mean 13.3966 3 9/5/2017 75 75 C.V. 0.1635 3 9/5/2017 14 14 C.V. 0.8768 4 9/18/2017 78 78 n 58 4 9/18/2017 12 12 n 58 5 10/2/2017 74 74 5 10/2/2017 10 10 6 10/16/2017 79 79 Mult Factor = 1.0 6 10/16/2017 11 11 Mult Factor = 1.00 7 11/1/2017 62 62 Max. Value 85.0 mg/L 7 11/1/2017 11 11 Max. Value 90.00 8 11/13/2017 64 64 Max. Pred Cw 85.0 mg/L 8 11/13/2017 16 16 Max. Pred Cw 90.00 9 12/4/2017 72 72 9 12/4/2017 21 21 10 12/18/2017 57 57 10 12/18/2017 11 11 11 1/2/2018 53 53 11 1/2/2018 13 13 12 1/16/2018 64 64 12 1/16/2018 15 15 13 2/5/2018 62 62 13 2/5/2018 9 9 14 2/19/2018 51 51 14 2/19/2018 9 9 15 3/5/2018 68 68 15 3/5/2018 15 15 16 3/19/2018 59 59 16 3/19/2018 9 9 17 4/2/2018 59 59 17 4/2/2018 11 11 18 4/16/2018 69 69 18 4/16/2018 12 12 19 5/1/2018 47.5 47.5 19 5/1/2018 8 8 20 5/14/2018 76 76 20 5/14/2018 10 10 21 6/4/2018 44.5 44.5 21 6/4/2018 13 13 22 6/18/2018 64 64 22 6/18/2018 13 13 23 7/2/2018 57 57 23 7/2/2018 12 12 24 7/16/2018 63 63 24 7/16/2018 10 10 25 8/1/2018 64 64 25 8/1/2018 14 14 26 8/13/2018 49 49 26 8/13/2018 14 14 27 9/4/2018 60 60 27 9/4/2018 5 5 28 9/17/2018 79 79 28 9/17/2018 12 12 29 10/1/2018 73 73 29 10/1/2018 16 16 30 10/15/2018 73 73 30 10/15/2018 6 6 31 11/5/2018 61 61 31 11/5/2018 11 11 32 11/19/2018 47 47 32 11/19/2018 16 16 33 12/3/2018 63 63 33 12/3/2018 9 9 34 12/17/2018 40.5 40.5 34 12/17/2018 11 11 35 1/2/2019 45.5 45.5 35 1/2/2019 9 9 36 1/14/2019 62 62 36 1/14/2019 90 90 37 2/4/2019 63 63 37 2/4/2019 23 23 38 2/18/2019 64 64 38 2/18/2019 11 11 39 3/4/2019 61 61 39 3/4/2019 12 12 40 3/18/2019 67 67 40 3/18/2019 6 6 41 4/1/2019 62 62 41 4/1/2019 7 7 42 4/15/2019 74 74 42 4/15/2019 8 8 43 5/1/2019 69 69 43 5/1/2019 12 12 44 5/13/2019 74 74 44 5/13/2019 10 10 45 6/3/2019 67 67 45 6/3/2019 12 12 46 6/17/2019 61 61 46 6/17/2019 8 8 47 7/1/2019 80 80 47 7/1/2019 9 9 48 7/15/2019 73 73 48 7/15/2019 10 10 49 8/5/2019 83 83 49 8/5/2019 9 9 50 8/19/2019 82 82 50 8/19/2019 15 15 51 9/3/2019 85 85 51 9/3/2019 9 9 52 9/16/2019 80 80 52 9/16/2019 10 10 53 10/1/2019 75 75 53 10/1/2019 13 13 54 10/14/2019 70 70 54 10/14/2019 12 12 55 11 /4/2019 79 79 55 11 /4/2019 10 10 56 11/18/2019 83 83 56 11/18/2019 6 6 57 12/2/2019 74 74 57 12/2/2019 7 7 58 12/16/2019 51 51 58 12/16/2019 7 7 26271 9595 Final FW RPA w_upstream avg data, data -4- 3/25/2020 DocuSign Envelope ID:4932EFD0-D72B-481D-8A64-B9BC9D977278 REASONABLE POTENTIAL ANALYSIS 'ECIAL Par12 copy late Cyanide ;8 Date Data BDL=1/2DL Results ug/L ug/L 1 < 5 5 Std Dev. 2 < 5 5 Mean 3 < 5 5 C.V. 4 < 5 5 n 5 < 5 5 6 < 5 5 Mult Factor = 7 < 5 5 Max. Value 8 < 5 5 Max. Pred Cw 9 < 5 5 10 < 5 5 11 < 5 5 12 < 5 5 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 Use "PASTE SPECIAL Par21 Use "PASTE SF Values" then "COPY" Values" then'•, . Maximum data Zinc . Maximum points = 58 points = 5 1 Date 8/1/2017 Data 349 BDL=1/2DL 349 Results Std Dev. 66.6781 0.0000 5.00 2 8/14/2017 285 285 Mean 103.6897 0.0000 3 9/5/2017 118 118 C.V. 0.6431 12 4 9/18/2017 106 106 n 58 5 10/2/2017 51 51 1.00 6 10/16/2017 48 48 Mult Factor = 1.00 5.0 ug/L 7 11/1/2017 61 61 Max. Value 349.0 5.0 ug/L 8 11/13/2017 115 115 Max. Pred Cw 349.0 9 12/4/2017 98 98 10 12/18/2017 176 176 11 1/2/2018 289 289 12 1/16/2018 189 189 13 2/5/2018 112 112 14 2/19/2018 116 116 15 3/5/2018 126 126 16 3/19/2018 62 62 17 4/2/2018 105 105 18 4/16/2018 78 78 19 5/1/2018 161 161 20 5/14/2018 85 85 21 6/4/2018 149 149 22 6/18/2018 73 73 23 7/2/2018 135 135 24 7/16/2018 14 14 25 8/1/2018 96 96 26 8/13/2018 58 58 27 9/4/2018 310 310 28 9/17/2018 81 81 29 10/1 /2018 116 116 30 10/15/2018 54 54 31 11 /5/2018 97 97 32 11/19/2018 73 73 33 12/3/2018 79 79 34 12/17/2018 80 80 35 1 /2/2019 101 101 36 1/14/2019 92 92 37 2/4/2019 183 183 38 2/18/2019 79 79 39 3/4/2019 143 143 40 3/18/2019 87 87 41 4/1/2019 72 72 42 4/15/2019 73 73 43 5/1/2019 77 77 44 5/13/2019 68 68 45 6/3/2019 87 87 46 6/17/2019 54 54 47 7/1/2019 52 52 48 7/15/2019 59 59 49 8/5/2019 66 66 50 8/19/2019 60 60 51 9/3/2019 51 51 52 9/16/2019 74 74 53 10/1/2019 77 77 54 10/14/2019 66 66 55 11 /4/2019 79 79 56 11/18/2019 56 56 57 12/2/2019 58 58 58 12/16/2019 55 55 26271 9595 Final FW RPA w_upstream avg data, data -5- 3/25/2020 DocuSign Envelope ID: 4932EFD0-D72B-481 D-8A64-B9BC9D977278 REASONABLE POTENTIAL ANALYSIS 'ECIAL Par22 COPY" We ;8 1 2 3 4 5 6 ug/L 7 ug/L 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 0 Date Data BDL=1/2DL Results Std Dev. Mean C.V. n Mult Factor = Max. Value Max. Pred Cw Use "PASTE SPECIAL Par23 Values" then "COPY" . Maximum data points = 58 NO DATA NO DATA 0 N/A N/A N/A 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 0 Date Data BDL=1/2DL Results Std Dev. Mean C.V. n Mult Factor = Max. Value Max. Pred Cw 26271 9595 Final FW RPA w_upstream avg data, data -6- 3/25/2020 DocuSign Envelope ID: 4932EFD0-D72B-481 D-8A64-B9BC9D977278 REASONABLE POTENTIAL ANALYSIS 26271 9595 Final FW RPA w_upstream avg data, data - 7 - 3/25/2020 DocuSign Envelope ID: 4932EFD0-D72B-481 D-8A64-B9BC9D977278 REASONABLE POTENTIAL ANALYSIS Use"PASTE SPECIAL Values" then "COPY" . Maximum data points = 58 Results Std Dev. NO DATA Mean NO DATA C.V. NO DATA Mult Factor = N/A Max. Value N/A Max. Pred Cw N/A 26271 9595 Final FW RPA w_upstream avg data, data $ 3/25/2020 DocuSign Envelope ID:4932EFD0-D72B-481D-8A64-B9BC9D977278 Town of Taylorsville WWTP NCO026271 Freshwater RPA - 95% Probability/95% Confidence Using Metal Translators MAXIMUM Qw (MGD) = 0.8300 1Q10S (cfs) = 11.91 7Q10S (cfs) = 14.40 7Q10W (cfs) = 25.30 30Q2 (cfs) = 35.20 Avg. Stream Flow, QA (cfs) = 84.30 Receiving Stream: Lower Little River HUC 030501011003 Outfall 001 Qw = 0.83 MGD DATA POINTS = 58 WWTP/WTP Class: Grade III Biological WPCS COMBINED HARDNESS (m¢/L) IWC% @ 1Q10S = 9.74879703 Acute = 25 mg/L IWC% @ 7Q10S = 8.201319606 Chronic = 25 mg/L IWC% @ 7Q10W = 4.838922009 IWC% @ 30Q2 = 3.525961657 IW%C @ QA = 1.503157624 Stream Class: WS-IV PARAMETER NC STANDARDS OR EPA CRITERIA V) REASONABLE POTENTIAL RESULTS RECOMMENDED ACTION TYPE J a z Applied Chronic Acute n # Det. Max Pred Cw Allowable Cw Standard Acute: NO WQS Chlorides NC 230 FW(7Q10s) mg;L 58 58 85.0 Chronic: 2,804.4 No RP, Predicted Max < 50% of Allowable Cw - No No value > Allowable Cw Monitoring required Acute: 107.42 Copper NC 7.8806 FW(7Q10s) 10.4720 ug/L 58 58 90.00 Chronic: 96.09 No RP , Predicted Max a 50% of Allowable Cw - No value > Allowable Cw apply Quarterly Monitoring Acute: 225.7 Cyanide NC 5 FW(7Q10s) 22 10 ug/L 12 0 5.0 Chronic: 61.0 No detects NO DETECTS Max MDL = 10 Acute: 1,289.4 Zinc NC 126.7335 FW(7Q10s) 125.7052 ug/L 58 58 349.0 Chronic: 1,545.3 No RP, Predicted Max < 50% of Allowable Cw - No No value > Allowable Cw Monitoring required 26271 9595 Final FW RPA w_upstream avg data, rpa Page 9 of 9 3/25/2020 DocuSign Envelope ID: 4932EFD0-D72B-481 D-8A64-B9BC9D977278 AFFIDAVIT OF PUBLICATION STATE OF NORTH CAROLMA COUNTY OF NEW HANOVER Public Notice North Carolina Environmental Man- agement Commission/NPDES Unit 1617 Mail Service Center Before the undersigned, a Notary Public of Said County and State, Raleigh, NC 27699-1617 st Notice of Intent to Issue a^ NPDES Wastewater Permit NCO026271 Town of Taylorsville Jarimy Springer The North Carolina Environmental Management Commission proposes to issue a NPDES wastewater dis- Who, being duly sworn or affirmed, according to the law, says that he/she is to the person(s) charge perm listed below. Written comments re- garding the proposed permit will be accepted until 30 days after the Accounting Specialist publish date of this notice. The Di- rector of the NC Division of Water Resources (DWR) may hold a public of THE STAR -NEWS, a corporation organized and doing business under the Laws of the State o hearing should there be a signifi- cant degree of public interest. North Carolina, and publishing a newspaper known as STAR -NEWS in the City of Wilmington Please mail comments and/or in- formation requests to DWR at the above address. Interested persons Public Notice North Carolina Environmental Management Commission/NPDES Unit 1617 may visit the DWR at 512 N. Salis- bury Street, Raleigh, NC to review Mail Service Center Raleigh, NC 27699-1617 Notice of Intent to Issue a NPDES Wastewater information on file. Additional in- formation on NPDES permits and Permit NCO026271 Town of Taylorsville The North Carolina Environmental Management this notice may be found on our Comm website: http://deq.nc.gov/aiDout/divislons/w ater-resou rces/water-resou rces- permits/wastewater-bra nch/npdes- wastewater/public-notices,or by calling (919) 707-3601. NCO026271: Town of Taylorsville, Alexander County, requests renewal 'I of permit for their wWTP discharg- was inserted in the aforesaid newspaper in space, and on dates as follows: ing to Lower Little River, Catawba River Basin. Currently, Total Resid- ual Chlorine and Ammonia Nitrogen are water quality limited. 4124 Ix IE, N0TAR� y AVBLIG i�// JJRiCI` `�x And at the time of such publication Star -News was a newspaper meeting all the requirements and qualifications prescribed by Sec. No. 1-597 G.S. of N.C. 7Title: Accounting Specialist '"6 Sworn or affirmed to, and subscribed before me this day of A.D., Z.®ZO In TeJtimony Whereof, I have hereunto set my hand and affixed my official seal, the day and year aforesaid. F n6 Notary Public Upon reading the aforegoing affidavit with the advertisement thereto annexed it is adjudged by the Court that the said publication was duly and properly made and that the summons has been duly and legally served on the defendant(s). This day of Clerk of Superior Court MAIL TO: DocuSign Envelope ID: 4932EFD0-D72B-481 D-M64-139BC91D977278 IWC Calculations Taylorsville WWTP NC0026271 Prepared By: Emily DelDuco, NPDES Program Enter Design Flow (MGD): 0.83 Enter s7Q10(cfs): 14.4 Enter w7Q10 (cfs): 25.3 Residual Chlorine Ammonia (NH3 as N) (summer) 7Q10 (cfs) 14.4 7Q10 (CFS) 14.4 DESIGN FLOW (MGD) 0.83 DESIGN FLOW (MGD) 0.83 DESIGN FLOW (cfs) 1.2865 DESIGN FLOW (cfs) 1.2865 STREAM STD (ug/L) 17.0 STREAM STD (mg/L) 1.0 UPS BACKGROUND LEVEL (1 0 UPS BACKGROUND LEVEL (mg/L) 0.22 IWC (%) 8.20 IWC (%) 8.20 Allowable Conc. (ug/1) 207 Allowable Conc. (mg/1) 9.7 Ammonia (NH3 as N) (winter) 7Q10 (CFS) 25.3 Fecal Limit 200/100ml DESIGN FLOW (MGD) 0.83 (If DF >331; Monitor) DESIGN FLOW (cfs) 1.2865 (If DF <331; Limit) STREAM STD (mg/L) 1.8 Dilution Factor (DF) 12.19 UPS BACKGROUND LEVEL (mg/L) 0.22 IWC (%) 4.84 Allowable Conc. (mg/1) 32.9 NPDES Servor/Current Versions/IWC 6/9/2020 DocuSign Envelope ID: 4932EFD0-D72B-481 D-8A64-B9BC9D977278 From: Cook, Clinton To: Kaufman, Tammv, DelDuco, Emilv Subject: FW: PWS approval NCO026271 Date: Wednesday, April 15, 2020 2:35:24 PM Attachments: image001.ona NCO026271 DRAFT renewal 2020.odf Ms. DelDuco and Ms. Kaufman, I appreciate the opportunity to review the subject draft NPDES permit and have included my response below in bold to satisfy the new paperless standards. I concur with issuance of the above permit as I have no appreciable expertise in implementation of the Clean Water Act requirements and have minimal understanding of the information provided. As a result. I have no basis for opposing the permit. (The nearest downstream raw water intake for a public water system is associated with the City of Statesville and is located approximately 18 miles downstream.) If you have any questions or need any additional information, please let me know. Thanks, Clint Clinton O. Cook, PE Regional Engineer Division of Water Resources — Public Water Supply Section North Carolina Department of Environmental Quality 704 663 1699 office 704 663 6040 fax clinton.cookQncdenr.gov Mooresville Regional Office 610 East Center Avenue, Suite 301 Mooresville, NC 28115 Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties. From: DelDuco, Emily Sent: Friday, April 3, 2020 3:37 PM To: Cook, Clinton <clinton.cook@ncdenr.gov> Subject: PWS approval NC0026271 Hi Clinton, NC0026271 / Taylorsville WWTP is a Grade III Biological facility in Alexander County which discharges DocuSign Envelope ID:4932EFD0-D72B-481D-8A64-B9BC9D977278 into Lower Little River [Stream segment 11-55-(5.5)] in the Catawba Basin, currently classified WS-IV waters. Please take a moment to review this draft and send me any comments when you are able. Please note that we're transitioning to paperless communication. As such, NPDES will no longer send the separate approval memo for PWS comments on this permit draft. The email response from you (or another PWS contact) will suffice to document the draft permit review by PWS. Thanks for your help, and let me know if you have any questions. Emily DelDuco Division of Water Resources Department of Environmental Quality 919-707-9125 emily.delduco(@ncdenr.gov Nothing Compares Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed to third parties.