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Home My WebLink AboutNC0024538_speculative limits_19940514State of North Carolina Department of Environment, Health and Natural Resources Division of Environmental Management 'T i El r A FA iiiF ,. James B. Hunt, Jr., Governor Jonathan B. Howes, Secretary A. Preston Howard, Jr., P.E., Director May 14, 1994 �EHNF Mr. David Wilkinson, City Manager City of Shelby Box 207-Washington at Graham St. Shelby, N.C. 28150 Subject: Shelby Wastewater Treatment Plant Expansion NPDES Permit No. NC0024538 Cleveland County Dear Mr. Wilkinson: Your request for speculative effluent limits for the proposed expansion of the Shelby WWTP to 8.5 MGD has been completed by the staff of the Technical Support Branch. In order to receive final permit limits, a formal application will have to be submitted to the Division's Permits and Engineering Unit. It should also be noted that an expansion of more than 0.5 MGD for an existing facility will require that an environmental document be prepared by the applicant. The N.C. Environmental Policy Act and its associated rules requires that an environmental assessment (EA) and Fonsi (Finding of No Significant Impact) be prepared before application for a permit expansion is submitted. If deemed appropriate, an environmental impact statement (EIS) might be necessary. Monica Swihart of the Water Quality Planning Branch can provide further information regarding the EA requirement. As discussed in previous correspondence, the 7Q10 flow in the First Broad River has been revised downward based on projected expansions of upstream water treatment plants. Based on available information, the tentative limits for conventional constituents are: Summer Winter Wasteflow (MGD) 8.5 8.5 BOD5 (mg/I) 30 30 NH3-N (mg/1) 3.6 7.1 TSS (mg/1) 30 30 Fecal Coliform (#/100ml) 200 200 pH (SU) 6-9 6-9 Chlorine (1.1.g/1) 28 28 It should be noted that the tentative NH3-N limits are based on protecting the First Broad River against instream toxicity. North Carolina is evaluating all NPDES dischargers for ammonia toxicity following the Environmental Protection Agency (EPA) guidance to protect the waters for an instream criteria of 1 mg/1 in the summer and 1.8 mg/1 in the winter, under 7Q10 flow conditions. P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone 919-733-7015 FAX 919-733-2496 An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper Letter to Mr. Wilkinson page 2 The Division of Environmental Management (DEM) is now recommending chlorine limits and dechlorination for all new or expanding dischargers proposing the use of chlorine for disinfection. An acceptable level of chlorine in your effluent is 28 µg/1 to ensure protection against acute toxicity. The process of chlorination/dechlorination or an alternate form of disinfection, such as ultraviolet radiation, should allow the facility to comply with the total residual chlorine limit. -- The instream waste concentration (IWC) at 8.5 MGD is 23%. A chronic toxicity testing requirement with quarterly monitoring will remain a condition of the NPDES permit. A complete evaluation of limits and monitoring requirements for metals and other toxicants will have to be addressed at the time of formal NPDES application. Information concerning these constituents is not readily available but the Town can assume that effluent limits and/or monitoring for cadmium, chromium, nickel, cyanide, lead, copper, zinc, and silver will continue. DEM is implementing a basinwide water quality management initiative. Our schedule for the Broad River Basin is set for 1998. The plan will attempt to address all sources of point and nonpoint pollutants where deemed necessary to protect or restore water quality standards. In addressing interaction of sources, wasteload allocations may be affected. Those facilities that already have committed to high levels of treatment technology are least likely to be affected. This information should provide some assistance in our planning endeavors. Final NPDES effluent limitations will be determined after a formal permit application has been submitted to the Division. If there are any additional questions concerning this matter, please feel free to contact Ruth Swanek or Jackie Nowell of my staff at (919) 733-5083. erely, Donald L Assistant cc: Rex Gleason Dallas Brickhouse, PiedmontOlsenHensley Central Files WLA File Shelby WWTP Speculative First Broad River 030804 JMN 5/13/94 Town requesting speculative limits for expansion to 8.5 MGD. Ran model for BOD and NH3 limits, also did mass balance for NH3 toxicity limits. Recommended BOD based on oxygen consuming and NH3 based on toxicity. Toxicity analysis was done for metals, etc. However didn't incorporate the limits into the speculative letter. Gave basic generic statement that toxicity limits would be further evaluated New analysis indicated that several metals now limited would be reduced to monitoring requirements per this evaluation. New IWC and chlorine limits was also evaluated. IWC = (8.5 * 1.55) = 13.18 = 0.229* 100 = 22.9%= 23% (8.5*1.55) +44.3 57.48 Joe Pearce of Pretreatment says that Shelby plant is poorly designed at this time, also have operational problems and periods of high BODs. Current removal BOD rate is 75% and TSS removal rate is 77%. Influent BOD is 152 mg/I and goes out at 38 mg/l. Influent TSS is 127 mg/1 and goes out at 30 mg/I. New plant should do better. However, Shelby is working on their sludge problems first, not water quality treatment. Shelby is currently;pn JOC, Regional Office will not renew the JOC upon expiration, but will recommed that an SOC be given. r 11' 11!:--' r 44-e-0 anti, /-44 ft i j)o D o rt- 4 1 11/4.8 eX r SH-13 EA 407— MODEL RESULTS Discharger : CITY OF SHELBY WWTP Receiving Stream : FIRST BROAD RIVER SUMMER EXP, @ 8.5 MGD,BOD=30,NH3=3.6, (TOX LIMIT) The End D.O. is 5.89 mg/l. The End CBOD is 13.41 mg/l. The End NBOD is 2.81 mg/l. WLA WLA WLA DO Min CBOD NBOD DO Waste Flow (mg/1) Milepoint Reach # (mg/1) (mg/1) (mg/1) (mgd) Segment 1 5.79 1.90 1 Reach 1 78.00 16.20 0.00 8.50000 Reach 2 0.00 0.00 0.00 0.00000 Reach 3 0.00 0.00 0.00 0.00000 Reach 4 0.00 0.00 0.00 0.00000 *** MODEL SUMMARY DATA *** 4. Discharger : CITY OF SHELBY WWTP Subbasin : 030804 Receiving Stream : FIRST BROAD RIVER Stream Class: C Summer 7Q10 : 44.3 Winter 7Q10 : 112.0 Design Temperature: 25.0 ILENGTHI SLOPE' VELOCITY 1 DEPTH) Kd 1 Kd 1 Ka 1 Ka 1 KN I I mile 1 ft/mil. fps I ft Idesign l @204 ldesign l @204 Idesign' 1 1 I 1 I 1 1 I I Segment 1 1 3.101 5.001 0.554 12.72 1 0.29 10.23 12.72 I 2.441 0.44 Reach 1 I 1 I 1 I 1 1 I I 1 I 1 I 1 I 1 I I Segment 1 1 1.601 9.101 0.660 1 2.51 1 0.32 1 0.26 1 5.90 I 5.291 0.44 Reach 2 I I 1 1 1 I I 1 1 I 1 I 1 I I Segment 1 1 0.201 9.101 0.674 1 2.57 10.32 1 0.26 16.02 1 5.401 0.44 Reach 3 I I I I I I I I 1 I I 1 I 1 Segment 1 2.20 2.501 0.464 1 3.11 10.27 1 0.21 11.14 1 1.021 0.44 Reach 4 1 I I I I 1 I Flow I CBOD I NBOD 1 D.O. I I cfs 1 mg/1 1 mg/1 I mg/1 I Segment 1 Reach 1 Waste 113.175 1 78.000 116.200 I 0.000 Headwaters) 44.300 1 2.000 I 1.000 I 7.440 Tributary I 4.100 I 2.000 I 1.000 I 7.440 * Runoff I 0.000 I 2.000 I 1.000 I 7.440 Segment 1 Reach 2 Waste I 0.000 I 0.000 1 0.000 I 0.000 Tributary I 1.000 I 2.000 1 1.000 I 7.440 * Runoff I 0.097 I 2.000 I 1.000 I 7.440 Segment 1 Reach 3 Waste I 0.000 1 0.000 I 0.000 I 0.000 Tributary I 4.300 I 2.000 I 1.000 I 7.440 * Runoff I 0.129 1 2.000 I 1.000 I 7.440 Segment 1 Reach 4 Waste I 0.000 1 0.000 I 0.000 I 0.000 Tributary I 0.000 I 2.000 I 1.000 I 7.440 * Runoff I 0.129 I 2.000 I 1.000 1 7.440 I Seg # 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Reach # 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 SUMMER EXP, @ 8.5 MGD,BOD=30,NH3=3.6, (TOX LIMIT) I Seg Mi I D.O. I CBOD I NBOD I Flow I 0.00 5.85 18.26 4.25 61.57 0.10 5.84 18.20 4.23 61.57 0.20 5.84 18.14 4.21 61.57 0.30 5.83 18.09 4.19 61.57 0.40 5.82 18.03 4.17 61.57 0.50 5.82 17.97 4.15 61.57 0.60 5.82 17.91 4.13 61.57 0.70 5.81 17.86 4.11 61.57 0.80 5.81 17.80 4.09 61.57 0.90 5.80 17.74 4.07 61.57 1.00 5.80 17.69 4.05 61.57 1.10 5.80 17.63 4.03 61.57 1.20 5.80 17.57 4.01 61.57 1.30 5.79 17.52 3.99 61.57 1.40 5.79 17.46 3.97 61.57 1.50 5.79 17.40 3.95 61.57 1.60 5.79 17.35 3.93 61.57 1.70 5.79 17.29 3.91 61.57 1.80 5.79 17.24 3.90 61.57 1.90 5.79 17.18 3.88 61.57 2.00 5.79 17.13 3.86 61.57 2.10 5.79 17.07 3.84 61.57 2.20 5.79 17.02 3.82 61.57 2.30 5.79 16.96 3.80 61.57 2.40 5.79 16.91 3.78 61.57 2.50 5.80 16.86 3.77 61.57 2.60 5.80 16.80 3.75 61.57 2.70 5.80 16.75 3.73 61.57 2.80 5.80 16.69 3.71 61.57 2.90 5.80 16.64 3.69 61.57 3.00 5.81 16.59 3.67 61.57 3.10 5.81 16.53 3.66 61.57 3.10 5.83 16.30 3.61 62.57 3.20 5.90 16.25 3.60 62.58 3.30 5.97 16.20 3.58 62.59 3.40 6.03 16.15 3.57 62.60 3.50 6.08 16.10 3.55 62.61 3.60 6.14 16.05 3.54 62.62 3.70 6.19 16.00 3.52 62.63 3.80 6.24 15.95 3.51 62.64 3.90 6.29 15.90 3.50 62.65 4.00 6.33 15.85 3.48 62.66 4.10 6.38 15.80 3.47 62.67 4.20 6.42 15.75 3.45 62.68 4.30 6.45 15.70 3.44 62.69 4.40 6.49 15.65 3.42 62.70 4.50 6.53 15.60 3.41 62.71 4.60 6.56 15.56 3.39 62.72 4.70 6.59 15.51 3.38 62.73 4.70 6.65 14.64 3.23 67.03 4.72 6.65 14.63 3.22 67.03 4.74 6.66 14.62 3.22 67.04 4.76 6.67 14.61 3.22 67.04 4.78 6.67 14.60 3.22 67.04 4.80 6.68 14.60 3.21 67.04 4.82 6.68 14.59 3.21 67.05 1 3 4.84 6.69 14.58 3.21 67.05 1 '3 4.86 6.70 14.57 3.21 67.05 1 3 4.88 6.70 14.56 3.20 67.05 1 3 4.90 6.71 14.55 3.20 67.06 1 4 4.90 6.71 14.55 3.20 67.06 1 4 5.10 6.62 14.44 3.16 67.08 1 4 5.30 6.53 14.33 3.13 67.11 1 4 5.50 6.44 14.23 3.09 67.13 1 4 5.70 6.36 14.12 3.05 67.16 1 4 5.90 6.29 14.02 3.02 67.19 1 4 6.10 6.21 13.91 2.98 67.21 1 4 6.30 6.14 13.81 2.95 67.24 1 4 6.50 6.08 13.71 2.91 67.26 1 4 6.70 6.01 13.61 2.88 67.29 1 4 6.90 5.95 13.51 2.84 67.31 1 4 7.10 5.89 13.41 2.81 67.34 I Seg # I Reach # I Seg Mi I D.O. I CBOD I NBOD I Flow I MODEL RESULTS Discharger : CITY OF SHELBY WWTP Receiving Stream : FIRST BROAD RIVER sigmbfftir— EXP, @ 8.5 MGD,BOD=30,NH3=7.1, (TOX LIMIT) The End D.O. is 5.48 mg/l. The End CBOD is 13.41 mg/l. The End NBOD is, 4.98 mg/l. DO Min (mg/1) Milepoint Reach # Segment 1 5.48 7.10 4 Reach 1 Reach 2 Reach 3 Reach 4 WLA WLA WLA CBOD NBOD DO Waste Flow (mg/1) (mg/1) (mg/1) (mgd) 78.00 0.00 0.00 0.00 32.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 8.50000 0.00000 0.00000 0.00000 *** MODEL SUMMARY DATA *** Discharger : CITY OF SHELBY WWTP Subbasin : 030804 Receiving Stream : FIRST BROAD RIVER Stream Class: C Summer 7Q10 : 44.3 Winter 7Q10 : 112.0 Design Temperature: 25.0 !LENGTH' SLOPEI VELOCITY 1 DEPTH' Kd 1 Kd I Ka 1 Ka 1 KN I 1 mile I ft/mil fps 1 ft Idesign l @20; Idesign l @201/2 Idesign' 1 1 I Segment 1 1 3.101 5.001 0.554 2.72 0.29 0.23 2.72 2.44 0.44 Reach 1 1 1 I I I 1 1 1 1 Segment 1 1.60 9.101 0.660 1 2.51 1 0.32 1 0.26 1 5.90 1 5.291 0.44 Reach 2 1 1 1 1 1 1 I Segment 1 Reach 3 I I 1 1 I 1 I 0.20 9.101 0.674 1 2.57 1 0.32 1 0.26 1 6.02 1 5.401 0.44 I I 1 1 1 1 I I 1 1 1 1 1 1 1 I Segment 1 1 2.201 2.501 0.464 1 3.11 1 0.27 1 0.21 1 1.14 1 1.021 0.44 Reach 4 I I I I I I I I I I Flow 1 CBOD 1 NBOD 1 D.O. I I cfs 1 mg/1 1 mg/1 1 mg/1 I Segment 1 Reach 1 Waste 113.175 1 78.000 1 32.000 1 0.000 Headwaters' 44.300 1 2.000 1 1.000 1 7.440 Tributary I 4.100 I 2.000 1 1.000 1 7.440 * Runoff I 0.000 I 2.000 1 1.000 I 7.440 Segment 1 Reach 2 Waste I 0.000 1 0.000 1 0.000 1 0.000 Tributary I 1.000 I 2.000 I 1.000 I 7.440 * Runoff I 0.097 1 2.000 1 1.000 1 7.440 Segment 1 Reach 3 Waste I 0.000 I 0.000 Tributary I 4.300 I 2.000 * Runoff I 0.129 I 2.000 0.000 1.000 1.000 0.000 7.440 7.440 Segment 1 Reach 4 Waste I 0.000 I 0.000 1 0.000 1 0.000 Tributary I 0.000 I 2.000 I 1.000 I 7.440 * Runoff I 0.129 1 2.000 1 1.000 I 7.440 unroff flow is in cfs/mile d' I Seg # I Reach # 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 3 1 3 1 3 1 3 1 3 1 3 1 3 SUMMER EXP, @ 8.5 MGD,BOD=30,NH3=7.1, (TOX LIMIT) I Seg Mi I D.O. I CBOD I NBOD I Flow I 0.00 5.85 18.26 7.63 61.57 0.10 5.83 18.20 7.60 61.57 0.20 5.80 18.14 7.56 61.57 0.30 5.78 18.09 7.52 61.57 0.40 5.76 18.03 7.49 61.57 0.50 5.74 17.97 7.45 61.57 0.60 5.73 17.91 7.41 61.57 0.70 5.71 17.86 7.38 61.57 0.80 5.69 17.80 7.34 61.57 0.90 5.68 17.74 7.31 61.57 1.00 5.66 17.69 7.27 61.57 1.10 5.65 17.63 7.24 61.57 1.20 5.64 17.57 7.20 61.57 1.30 5.62 17.52 7.17 61.57 1.40 5.61 17.46 7.13 61.57 1.50 5.60 17.40 7.10 61.57 1.60 5.59 17.35 7.06 61.57 1.70 5.58 17.29 7.03 61.57 1.80 5.57 17.24 6.99 61.57 1.90 5.56 17.18 6.96 61.57 2.00 5.56 17.13 6.93 61.57 2.10 5.55 17.07 6.89 61.57 2.20 5.54 17.02 6.86 61.57 2.30 5.54 16.96 6.82 61.57 2.40 5.53 16.91 6.79 61.57 2.50 5.53 16.86 6.76 61.57 2.60 5.52 16.80 6.73 61.57 2.70 5.52 16.75 6.69 61.57 2.80 5.51 16.69 6.66 61.57 2.90 5.51 16.64 6.63 61.57 3.00 5.51 16.59 6.60 61.57 3.10 5.50 16.53 6.56 61.57 3.10 5.53 16.30 6.48 62.57 3.20 5.61 16.25 6.45 62.58 3.30 5.68 16.20 6.42 62.59 3.40 5.74 16.15 6.39 62.60 3.50 5.80 16.10 6.37 62.61 3.60 5.86 16.05 6.34 62.62 3.70 5.92 16.00 6.31 62.63 3.80 5.97 15.95 6.29 62.64 3.90 6.02 15.90 6.26 62.65 4.00 6.07 15.85 6.23 62.66 4.10 6.11 15.80 6.21 62.67 4.20 6.16 15.75 6.18 62.68 4.30 6.20 15.70 6.16 62.69 4.40 6.24 15.65 6.13 62.70 4.50 6.28 15.60 6.10 62.71 4.60 6.31 15.56 6.08 62.72 4.70 6.35 15.51 6.05 62.73 4.70 6.42 14.64 5.73 67.03 4.72 6.42 14.63 5.72 67.03 4.74 6.43 14.62 5.72 67.04 4.76 6.44 14.61 5.72 67.04 4.78 6.44 14.60 5.71 67.04 4.80 6.45 14.60 5.71 67.04 4.82 6.46 14.59 5.70 67.05 1 '3 1 3 1 3 1 4 1 4 1 4 1 4 1 4 1 4 1 4 1 4 -1 4 1 4 1 4 1 4 I Seg # I Reach 4.84 6.46 4.86 6.47 4.88 6.48 4.90 6.48 4.90 6.48 5.10 6.37 5.30 6.26 5.50 6.16 5.70 6.06 5.90 5.96 6.10 5.87 6.30 5.79 6.50 5.70 6.70 5.63 6.90 5.55 7.10 5.48 # I Seg Mi I D.O. 14.58 14.57 14.56 14.55 14.55 14.44 14.33 14.23 14.12 14.02 13.91 13.81 13.71 13.61 13.51 13.41 I CBOD 5.70 5.69 5.69 5.68 5.68 5.61 5.55 5.48 5.42 5.35 5.29 5.23 5.17 5.10 5.04 4.98 NBOD 67.05 67.05 67.05 67.06 67.06 67.08 67.11 67.13 67.16 67.19 67.21 67.24 67.26 67.29 67.31 67.34 Flow I MODEL RESULTS Discharger : CITY OF SHELBY WWTP Receiving Stream : FIRST BROAD RIVER SUMMER MODEL FOR SHELBY EXP. @ 8.5, BOD=21, NH3=15 FOR DO The End D.O. is 5.09 mg/l. The End CBOD is 9.77 mg/1. The End NBOD is 9.87 mg/l. WLA WLA WLA DO Min CBOD NBOD DO Waste Flow (mg/1) Milepoint Reach # (mg/1) (mg/1) (mg/1) (mgd) Segment 1 5.09 7.10 4 Reach 1 Reach 2 Reach 3 Reach 4 54.60 67.50 0.00 0.00 0.00 0.00 0.00 0.00 5.00 0.00 0.00 0.00 8.50000 0.00000 0.00000 0.00000 *** MODEL SUMMARY DATA *** Discharger : CITY OF SHELBY WWTP Subbasin : 030804 Receiving Stream : FIRST BROAD RIVER Stream Class: C Summer 7Q10 : 44.3 Winter 7Q10 : 112.0 Design Temperature: 25.0 'LENGTH' SLOPE) VELOCITY 1 DEPTH) Kd 1 Kd 1 Ka 1 Ka 1 KN 1 I mile 1 ft/mil fps I ft Idesign l @204 Idesignl @204 Idesign' I 1 Segment 1 1 3.10I 5.001 0.554 2.72 0.29 0.23 2.72 2.44 0.44 Reach 1 1 1 1 1 I 1 1 1 I Segment 1 1.60 9.101 0.660 1 2.51 10.32 10.26 15.90 1 5.291 0.44 Reach 2 I 1 1 I 1 1 1 1 1 1 1 1 1 Segment 1 1 0.201 9.101 0.674 1 2.57 10.32 1 0.26 16.02 1 5.401 0.44 Reach 3 1 I I I 1 1 I 1 I Segment Reach I I I I 1 I I I 2.201 2.501 0.464 1 3.11 1 0.27 1 0.21 1 1.14 I 1.021 0.44 I Flow 1 CBOD 1 NBOD 1 D.O. 1 1 cfs I mg/1 I mg/1 1 mg/1 I Segment 1 Reach 1 Waste 113.175 154.600 167.500 1 5.000 Headwaters) 44.300 1 2.000 I 1.000 I 7.440 Tributary I 4.100 1 2.000 I 1.000 I 7.440 * Runoff 1 0.000 1 2.000 I 1.000 I 7.440 Segment 1 Reach 2 Waste 1 0.000 I 0.000 I 0.000 I 0.000 Tributary 1 1.000 I 2.000 I 1.000 I 7.440 * Runoff 1 0.097 1 2.000 1 1.000 I 7.440 Segment 1 Reach 3 Waste I 0.000 I 0.000 I 0.000 I 0.000 Tributary 1 4.300 I 2.000 1 1.000 1 7.440 * Runoff 1 0.129 I 2.000 1 1.000 I 7.440 Segment 1 Reach 4 Waste 1 0.000 I 0.000 I 0.000 1 0.000 Tributary 1 0.000 I 2.000 I 1.000 I 7.440 * Runoff 1 0.129 1 2.000 I 1.000 I 7.440 SUMMER MODEL FOR SHELBY EXP. @ 8.5, BOD=21, NH3=15 FOR DO Seg # I Reach # I Seg Mi I D.O. I CBOD I NBOD I Flow I 1 1 0.00 6.92 13.25 15.23 61.57 1 1 0.10 6.84 13.21 15.15 61.57 1 1 0.20 6.77 13.17 15.08 61.57 1 1 0.30 6.70 13.13 15.01 61.57 1 1 0.40 6.63 13.09 14.94 61.57 1 1 0.50 6.57 13.04 14.86 61.57 1 1 0.60 6.51 13.00 14.79 61.57 1 1 0.70 6.45 12.96 14.72 61.57 1 1 0.80 6.39 12.92 14.65 61.57 1 1 0.90 6.33 12.88 14.58 61.57 1 1 1.00 6.28 12.84 14.51 61.57 1 1 1.10 6.23 12.80 14.44 61.57 1 1 1.20 6.18 12.75 14.37 61.57 1 1 1.30 6.13 12.71 14.30 61.57 1 1 1.40 6.09 12.67 14.23 61.57 1 1 1.50 6.04 12.63 14.16 61.57 1 1 1.60 6.00 12.59 14.09 61.57 1 1 1.70 5.96 12.55 14.02 61.57 1 1 1.80 5.92 12.51 13.95 61.57 1 1 1.90 5.88 12.47 13.88 61.57 1 1 2.00 5.85 12.43 13.82 61.57 1 1 2.10 5.82 12.39 13.75 61.57 1 1 2.20 5.78 12.35 13.68 61.57 1 1 2.30 5.75 12.31 13.62 61.57 1 1 2.40 5.72 12.27 13.55 61.57 1 1 2.50 5.69 12.23 13.48 61.57 1 1 2.60 5.67 12.19 13.42 61.57 1 1 2.70 5.64 12.16 13.35 61.57 1 1 2.80 5.62 12.12 13.29 61.57 1 1 2.90 5.59 12.08 13.22 61.57 1 1 3.00 5.57 12.04 13.16 61.57 1 1 3.10 5.55 12.00 13.10 61.57 1 2 3.10 5.58 11.84 12.90 62.57 1 2 3.20 5.64 11.80 12.85 62.58 1 2 3.30 5.69 11.77 12.79 62.59 1 2 3.40 5.74 11.73 12.74 62.60 1 2 3.50 5.79 11.69 12.69 62.61 1 2 3.60 5.84 11.66 12.63 62.62 1 2 3.70 5.88 11.62 12.58 62.63 1 2 3.80 5.93 11.59 12.53 62.64 1 2 3.90 5.97 11.55 12.47 62.65 1 2 4.00 6.01 11.51 12.42 62.66 1 2 4.10 6.04 11.48 12.37 62.67 1 2 4.20 6.08 11.44 12.32 62.68 1 2 4.30 6.11 11.41 12.27 62.69 1 2 4.40 6.15 11.37 12.21 62.70 1 2 4.50 6.18 11.34 12.16 62.71 1 2 4.60 6.21 11.30 12.11 62.72 1 2 4.70 6.23 11.26 12.06 62.73 1 3 4.70 6.31 10.67 11.35 67.03 1 3 4.72 6.32 10.66 11.34 67.03 1 3 4.74 6.32 10.66 11.33 67.04 1 3 4.76 6.33 10.65 11.32 67.04 1 3 4.78 6.34 10.64 11.31 67.04 1 3 4.80 6.34 10.64 11.30 67.04 1 3 4.82 6.35 10.63 11.29 67.05 1 4 4.84 6.35 10.62 1 3 4.86 6.36 10.62 1 3 4.88 6.36 10.61 1 3 4.90 6.37 10.61 1 4 4.90 6.37 10.61 1 4 5.10 6.22 10.53 1 4 5.30 6.08 10.45 1 4 5.50 5.95 10.37 1 4 5.70 5.82 10.29 1 4 5.90 5.70 10.22 1 4 6.10 5.59 10.14 1 4 6.30 5.48 10.07 1 4 6.50 5.37 9.99 1 4 6.70 5.27 9.92 1 4 6.90 5.18 9.85 1 4 7.10 5.09 9.77 Seg # I Reachli# I Seg Mi I D.O. I CBOD 1 11.29 11.28 11.27 11.26 11.26 11.12 10.99 10.86 10.73 10.60 10.48 10.35 10.23 10.11 9.99 9.87 NBOD I 67.05 67.05 67.05 67.06 67.06 67.08 67.11 67.13 67.16 67.19 67.21 67.24 67.26 67.29 67.31 67.34 Flow I WHOLE EFFLUENT TOXICITY TESTING 0(SELF-MONITORING SUMMARY' Mon, Apr 18, 1994 FACILITY REQI IIRI:MF.NT YF.AR JAN FEB MAR APR MAY JUN JUL AUG SEP OCT SALISBURY-GRANTS CREEK WWTP PERM CIIR LIM:67% N00023884/001 Begin:4/1/91 Frequency: Q P/F A MAR JUN SEP DEC NonComp: County:ROWAN Region:MRO Subbasin:YADO4 PF:7.5 Special 214/94-3/31/94-Q CIIR P/F MONIT 67%, G SAME MOS AS .7Q10:5.8 IWC(%):67 On1cr.1'ERMIT Y 90 - 91 - 02 FAIL 93 PASS 94 FAIL - - PASS -• FAIL . PASS PASS PASS(s) PASS -- - -- -- -- - - -- FAIL PASS PASS(s) FAIL -- - - FAIL PASS - - FAIL PASS FAIL PASS(s) FAIL -- FAIL - FAIL -. FAIL. ' -- FAIL 'F FAIL SALISBURY-TOWN CREEK W WTP PERM CIIR LIM:85% Y 90 - - PASS - - PASS - - PASS -- -- FAIL NC0023892/001 Begin:2/1/88 Frequency: Q P/F MAR JUN SEP DEC NonComp: 91 -• - FAIL PASS PASS PASS PASS - PASS --- --- PASS County:ROWAN C , Region:MRO Subbasin:YAD04 92 -- - PASS,F •-- - PASS -- - FAIL(s) PASS(s) --- PASS(s) PF:5.00 ' Special 93 -- - PASS(s) - PENDING(s) - - PASS -- •-• PENG 4G 7Q10: 1.40 IWC(%):84.7 Order. 94 -- -- SANDOZ(SODYECO) PERM CHR LIM:LS% Y 90 - (FAIL) --- --- PASS -•- - PASS - --- 143 PASS NC0004375/001 Bcgin:9/1/91 Frequency: Q P/F A MAR JUN SEP DEC NonComp: 91 - 14q PASS --- --- PASS -- - IQ --- -•- PASS „ County:MECKI.ENBURG Region: MRO Subbasin:CTB34 92 -- - FAIL FAIL PASS FAIL PASS - PASS --- •-- et PF:3.90 Special 93 PASS - FAIL PASS •-- PASS - - PASS --- --• PASS 7Q10:95.0 IWC(%):5.98 Order. 94 --• - SANPORU, 111E BUIg1AI.O WW'IP I'Iill M CIllt 1.1M:39% 00 -.• ••- I'ASS •-• •-- PASS -.• -- PASS -•- ... PASS N00024147/001 Begin:6/1/93 Frequency: Q PA' A MAR JUN SIJ' DUC NonComp:SINGLI( 91 •- •- PASS -- PASS -- --- PASS --- -•' PASS County:LEE Region:RRO Subbnsin:Cl'FII 92 - - PASS -- - FAIL PASS --- PASS •-- --- PASS PP:6.8 Special 93 ... -- PASS --- --- PASS •- -- PASS --• -•- PASS 7Q10: 16.75 IWC(%):39 Order: 94 -- - PASS SCARLETr ACRES PERM CHR LIM:90% (GRAB) 90 •- - - -- - -- - FAIL FAIL .•- --- FAIL NC0061204/001 Begin:12/1/93 Frequency: Q P/F A FEB MAY AUG NOV NonComp:SINGLE 91 FAIL PASS - FAIL FAIL PASS FAIL PASS --- PASS --- County:FORSYTH Region: WSRO Subbasin: YADO4 92 - PASS - --• PASS - -- FAIL PASS -- PASS - PF:0.02 Special 7Q10: 0.0 IWC(%):100.0 Order. 93 - 94 -- PASS Bl -- FAIL •-• FAIL PASS - PASS - --- PASS SCIJNEIDER MILLS, INC: 001 PERM CIIR LIM:46% 90 -- --• FAIL --• PASS - - PASS --- -•• PASS NC00348601001 Bcgin:9/1/93 Frequency: Q P/F A JUN SEP D13C MAR NonCornp:SING1.13 91 -- --• 141 FAIL - PASS -- -- PASS --- --- NA County:ALEXANDER Region: MRO Subbasin: CTB32 92 PASS ••- FAIL -• - FAIL -- - PASS .-- ••- PASS PF:078 Special 93 •- -- FAIL FAIL - PASS - - FAIL FAIL 14,1 FAIL 7Q10:1.40 IWC(%):46 Order. 94 FAIL PASS FAIL. SCO TLAND NECK W WTP PERM CIIR LIM:90% 90 - - -•- - • --- .- -- -- •-- - - - NC0023337/001 Begin:4/I/92 Frequency: Q P/F A FED MAY AUG NOV NonComp:Singlc 91 - - --- -- -. - -- ... -- .-. County:IIALIFAX . Region:RRO Subhnsin:TAR04 92 -- -- - •-- all -- -- PASS -•• •-- PASS ••- PI': 0.6750 Special 93 -- PASS -.. -.- PASS .-- -• PASS -•• -•- PASS •-- 7Q10: 0.000 IWC(%):100.00 Onler: 94 - PASS SEALED AIR CORP. 001 PERM CI IR LIM:8.0% 90 -- - PASS PASS -• --- PASS --- --- PASS NC0006254/001 Begin:9/1/93 Frequency: Q P/F G MAR JUN SEP DEC NonComp:SINGLE 91 -- - PASS -- - PASS - -- PASS - -- PASS County:CALDWELL Region:ARO Subbasin:YADOI - 92 - -- PASS -- - PASS -• - INVAUO PASS -- PASS PP:0.45 Special 93 ... •-. PASS •-- -- PASS - - PASS --- ••• LATE.PASS 7Q10: 8.00 IWC(%):8.02 Order. 94 -- -- SEN IRS REST 110MII PERM CIIR LIM:90% (GRAB), 4/1/94-NO I.1M 90 -- -• - ••• -- - - - - -- ... -- NC00.18I01/001 Bcgin:4/I/91 14nprcncy: Q WI' A JAN AI'It 1111. C)CI' NonComp:SIN(;1.11 91 ••- ••• -- PASS --- --- PASS --- --- PASS --- ..• County: I IARNETf Region: FRO Subbasin: CPF07 92 FAIL Nfi td1 FAIL nil -• FAIL,PASS --• -- FAIL PASS FAIL Pr:0.007 Special 93 FAIL PASS - PASS - - PASS -- -- PASS --- -- 7QI0:0.0 IWC(%):100.0 Order. 94 PASS ... SIIIIAY WWII' PI1RM CIIR LIM:12% 90 --- PASS --• PASS r - PASS -- PASS •-• NC0024538/001 Begin:12/1/91 Frequency: Q P/F A FEB MAY AUG NOV NonComp:. 91 •-- PASS --- PASS -• -- PASS - - PASS _ County:CLEVELAND Rcgion:MRO Subbaein:BRD04 92 ••- PASS --- --- PASS --- --- PASS --- --- PASS --- Pr•:6.o Special 93 .-- PASS --- --- PASS --- --- PASS - - -• FAIL. NI 7Q10:70.5 IWC(%):11.63 Order 94 PASS PASS 0 2 consecutive failures = significant noncompliance Y Pre 1990 Dam Available LEGEND: PERM = Permit Requirement LET= Administrative Letter - Target Frequency = Monitoring frequency: Q. Quarterly; M- Monthly; BM- Bimonthly; SA- Semiannually; A- Annually: OWD- Only when discharging: D• Discontinued monitoring requirement: IS- Conducting independent study Dentin =First month required 7Q10 = Receiving stream low flow criterion (efs) G =quarterly monitoring increases to monthly upon single failure Months that testing must occur • ex. JAN,APR,JUI.,OCT NonComp= Current Compliance Requirement P1' = Permitted flow (MGD) IWC%= lnstrearn waste concentration P/F = Pass/Fnd chronic test AC = Acute CI IR = Chronic Data Notation: f - Fathead Minnow: • - Ceriodapbnia so.: my - Mvsid shrimp: ChV - Chronic value: P - Morality of stated percentage at highest concentration: at • Pesfomted by DEM Aa Tog Group: bt - Bad test Reporting Notation: -- = Data not required: NR - Not reported: ( ) - Beginning of Quarter Facility Activity Status: 1. Inactive. N - Newly Issucd(To construct); 11 - Active but not discharging; t-Morc data available for month in question SIG = ORC signalun needed 45 TOXICANT ANALYSIS Facility Name Shelby WWTP NPDES # NC0024538 Ow (MGD) 8.5 7Q 1Os (cfs) ._.._.._.._.._.._.._.._.._.._.._.._.44.3 22 .._.._.._.._.._.._.._.._.._.._.._..,92 First Broad River /WC (%) Reeving Stream Stream Class C FINAL RESULTS Cadmium 4�y f Max. Pred Cw 44 Allowable Cw 8.7 Chromium /{simr{rY/G,fti t` Max. Fred Cw 201.6 Allowable Cw 218.1 I Nickel o„� Max. Pred Co/ 121 Allowable Cw' 383.9 Cyanide awit- Max. Pr,-4 r`',; 54.4 Allow._,!; :: 21.8 Lead - 4✓' Max. I', 1 - 26.4 Allo,.,v 109.1 Copper /1101r{�✓ Max. Prof.! C,•• 299.6 Allow;.'. ) D.,,i 30.5 Zinc 1 iirrx/j►/ Max. 1 368 Allc• 218.1 Silver ACMilli,/ Ma,. 50 Al' 0.3 All: 0.0 • Max. ' 0 All', . 0.0 May. 0 All , 0.0 _na4. :,i' 0 0.0 4/5/94 PAGE' TOXICANT ANALYSIS Facility Name Shelby WWTP NPDES # NC0024538 Qw (MGD) _ 8.5 7Q 10s (cfs) , .._.. 44.3 IWC (%) Reeving Stream ._.._.._.._____.._.._..____..22.92 First Broad River Stream Class C FINAL RESULTS Cadmium Max. Pred Cw 44 Allowable Cw 8.7 Chromium Max. Pred Cw 201.6 Allowable Cw 218.1 Nickel Max. Pred Cw 121 Allowable Cw 383.9 Cyanide Max. Pred Cw 54.4 Allowable Cw 21.8 Lead Max. Pred Cw 26.4 Allowable Cw 109.1 Copper Max. Pred Cw 299.6 Allowable Cw 30.5 Zinc Max. Pred Cw 368 Allowable Cw 218.1 Silver Max. Pred Cw 50 Allowable Cw 0.3 0 Max. Pred Cw 0 Allowable Cw 0.0 0 Max. Pred Cw 0 Allowable Cw 0.0 0 Max. Pred Cw 0 Allowable Cw 0.0 0 Max. Pred Cw 0 Allowable Cw 0.0 4/5/94 PAGE ' SHELBY WWTP Residual Chlorine 7010 (CFS) DESIGN FLOW (MGD) DESIGN FLOW (CFS) STREAM STD (UG/L) UPS BACKGROUND LEVEL (UG/L) IWC (%) Allowable Concentration (ug/I) Fecal Limit Ratio of 3.4 :1 Ammonia as NH3 (summer) 44.3 7Q10 (CFS) 44.3 8.5 DESIGN FLOW (MGD) 8.5 13.175 DESIGN FLOW (CFS) 13.175 17.0 STREAM STD (MG/L) 1.0 0 UPS BACKGROUND LEVEL (MG/L) 0.22 22.92 IWC (%) 22.92 74.16 Allowable Concentration (mg/I) 3.62 (Jr ,1 N33ca) Ammonia as NH3 (winter) 7Q10 (CFS) 200/100m1 DESIGN FLOW (MGD) DESIGN FLOW (CFS) STREAM STD (MG/L) UPS BACKGROUND LEVEL (MG/L) IWC (%) Allowable Concentration (mg/I) 44.3 8.5 13.175 1.8 0.22 22.92 7.11 N13Q0) NC0024538 3/3 1/94 Summer/Winter (circle one) maimmomo =gm rograirldi Min 111111 111'7 11111111111 ""inurrus...rappray ilitiorirburnmaa: maw opulkim NH3-N (mg/1) Potential effluent limit. combinations: GKEX88/MP r COMPLIANCE EVALUATION ANALYSIS REPORT 03/31/94 PAGE 1 PERMIT--NC0024538 PIPE--001 REPORT PERIOD: 9302-9401 LOC---E FACILITY--SHELBY WWTP, CITY OF DESIGN FLOW-- 6.0000 CLASS--4 LOCATION--SHELBY REGION/COUNTY--03 CLEVELAND 50050 00310 00530 00610 31616 50060 00300 TGP3B MONTH Q/MGD BOD RES/TSS NH3+NH4- FEC COLI CHLORINE DO CERI7DPF LIMIT S 6.0000 S 45.00 S 70.0 NOL S 1000.0 NOL S 4.00 NOL 93/02 5.1750 39.10 23.4 15.00 15.0 1.054 8.10 1 93/03 �6.441F 38.13 23.5 7.78 14.8 .881 8.43 93/04 5.5080 42.76 28.4 9.40 17.3 .906 7.92 93/05 4.3261 41.20 31.8 13.65 73.9 .927 6.91 93/ 06 3.8633 37.40 40.7 15.06 18.9 1.320 6.23 93/07 3.4312 31.61 31.3 12.92 18.8 1.351 5.81 93/08 3.4638 27.27 25.0 10.62 19.2 1.661 6.40 93/09 3.3883 31.66 22.7 8.93 12.0 1.574 6.84 93/10 3.7461 36.66 28.5 8.47 13.3 1.401 8.57 93/11 3.8446 34.85 30.3 13.98 7.8 1.460 8.43 2 93/12 3.7096 44.55 32.6 16.41 4.9 1.616 8.76 94/01 4.5432 l 51.66F>` 32.2 14.22 12.3 1.210 8.49 AVERAGE 4.2869 38.07 29.2 12.20 19.0 1.280 7.57 1 MAXIMUM 9.1600 106.00 55.0 22.50 1525.0 2.200 10.40 2 MINIMUM 1.1800 7.00 11.0 4.80 LESSTHAN .260 4.20 1 UNIT MGD MG/L MG/L MG/L #/100ML MG/L MG/L PASS/FAI 411 r GKEX88/MP COMPLIANCE EVALUATION ANALYSIS REPORT 03/31/94 PAGE 2 PERMIT--NC0024538 PIPE--001 REPORT PERIOD: 9302-9401 LOC---E FACILITY--SHELBY WWTP, CITY OF DESIGN FLOW-- 6.0000 CLASS--4 LOCATION--SHELBY REGION/COUNTY--03 CLEVELAND 00010 00082 00400 00600 00665 00720 01027 01034 MONTH TEMP COLOR PH TOTAL N PHOS-TOT CYANIDE CADMIUM CHROMIUM LIMIT NOL NOL 9.0 6.0 NOL NOL 93/02 16.15 7.5-6.8 3.5000 9.0000 31.7500 93/03 16.26 7.3-6.8 4.4000 9.6000 21.4000 93/04 19.52 7.3-6.8 .420 2.5000 .0000 13.2500 45.0000 93/05 24.45 7.3-6.8 13.5000 3.2500 60.5000 93/06 27.63 7.2-6.5 11.8000 5.0000 75.0000 93/07 29.19 7.1-6.2 .0000 5.2500 38.2500 93/08 28.81 7.0-6.5 9.5000 1.1500 37.7500 93/09 27.42 7.6-6.7 8.4000 4.3200 33.0000 93/10 24.04 7.6-6.8 2.050 2.6500 12.7500 .0000 45.7500 93/11 20.04 7.6-7.1 9.7500 .5000 92.2500 93/12 16.60 7.5-7.1 9.6000 1.2000 63.2000 11 94/01 13.73 7.5-6.9 14.2500 5.7500 67.0000 AVERAGE 21.98 1.235 2.5750 8.1208 4.8558 50.9041 MAXIMUM 33.00 7.600 2.050 2.6500 34.0000 23.0000 126.0000 MINIMUM 8.00 6.200 .420 2.5000 7.0000 1.0000 14.0000 UNIT DEG.0 SU MG/L MG/L UG/L UG/L UG/L .• GKEX88/MP 03/31/94 COMPLIANCE EVALUATION ANALYSIS REPORT PAGE 3 r PERMIT--NC0024538 PIPE--001 REPORT PERIOD: 9302-9401 LOC---E FACILITY--SHELBY WWTP, CITY OF DESIGN FLOW-- 6.0000 CLASS--4 LOCATION--SHELBY REGION/COUNTY--03 CLEVELAND 01042 01051 01067 01077 01092 MONTH COPPER LEAD NICKEL SILVER ZINC LIMIT NOL NOL NOL NOL 93/02 13.0000 9.0000 3.2500 24.0000 100.0000 93/03 .0000 .0000 .0000 13.0000 50.0000 93/04 30.0000 .0000 9.2500 3.0000 80.0000 93/05 36.0000 .0000 .0000 17.0000 130.0000 93/06 .0000 .0000 11.0000 .0000 130.0000 93/07 38.0000 .0000 2.5000 .0000 41.0000 93/08 60.0000 5.0000 7.5000 10.0000 66.0000 93/09 51.000.0 .0000 .0000 9.0000 67.0000 93/10 .0000 .0000 .0000 .0000 130.0000 93/11 .0000 .0000 6.0000 18.3000 140.0000 93/12 107.0000 11.0000 7.8000 22.0000 184.0000 94/01 67.0000 5.0000 12.5000 50.0000 191.0000 AVERAGE 33.5000 2.5000 4.9833 13.8583 109.0833 MAXIMUM 107.0000 11.0000 55.0000 50.0000 191.0000 MINIMUM 13.0000 5.0000 3.0000 41.0000 UNIT UG/L UG/L UG/L UG/L UG/L P%dmontOlsenHensley Offices: Greenville, SC Raleigh, NC Atlanta, GA Chattanooga, TN Englneers/Archltects/Sunreyors P.O. Box 31388, Raleigh, NC 27622-1388 2301 Rexwoods Drive, Suite 200, 27607 (919) 782-5511 Fax: (919) 782-5905 December 15, 1993 ,JDEC 1 o io :.• Department of Environment, Health, and Natural Resources Division of Environmental Management Post Office Box 29535 Raleigh, North Carolina 27626-0535 Attn: Ms. Ruth Swanek, Supervisor Instream Assessment Unit Technical Support Branch, Water Quality Section Reference: First Broad River Wastewater Treatment Plant Expansion Shelby, North Carolina Piedmont Olsen Hensley Project Number 881.30 Dear Ms. Swanek: Our firm has been retained by the City of Shelby to assist in preliminary planning for a possible expansion of the referenced wastewater treatment plant. The plant currently operates under NPDES Permit NC0024538 which expires on December 31, 1993. The permit has recently been renewed, and a new permit has been issued which expires on December 31, 1998. The new permit average monthly limits after completion of the upstream water treatment plant expansion in November 1994 are: 6.0 MGD Flow, 25.0 mg/1 BOD, 30 mg/1 TSS, 18.5 mg/1 NH3 as N, 200.0/100 ml Fecal Coliform. As a part of our planning, we would appreciate receiving an opinion regarding effluent limits which may be imposed on the City of Shelby's referenced wastewater treatment plant in permit renewals in the foreseeable future. We request that limits be evaluated for a future maximum monthly average flow of 8.5 MGD. The corresponding annual average flow is estimated to be 7.0 MGD. We realize that the treatment limits furnished by the Technical Support Branch are speculative at this time. However, in the planning process, we want to take advantage of the best available information. • 4 d- • Ms. Ruth Swanek December 15, 1993 Page 2 Your prompt response would be appreciated so that the planning can proceed. Please do not hesitate to contact me if you need additional data or if I can be of assistance. Very truly yours, PI FONT OLSEN HENSLE_, INC. • Dallas Brickhouse, Jr., PE Project Manager /ps cc: Mr. Donald F. Rhom PiedniontOlsenHensley