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Home My WebLink AboutNC0036668_Wasteload Allocation_19870612NPDES DOCUMENT SCANNING COVER SHEET NPDES Permit: NC0036668 Kenansville WWTP Document Type: Permit Issuance Wasteload Allocation Authorization to Construct (AtC) Permit Modification Complete File - Historical Engineering Alternatives (EAA) Correspondence Owner Name Change Instream Assessment (67b) Speculative Limits Environmental Assessment (EA) Document Date: June 12, 1987 This document is printed on reuse romper - ignore Envy content on the rezrerse side DIVISION OF ENVIRONMENTAL MANAGEMENT June 12, 1987 MEMORANDUM TO: Alan Wahab FROM: Jackie Nowel1j11 THROUGH: Trevor Clement*� SUBJECT: AT Checklist: Kenansville We have completed the modeling work for the Town of Kenansville WWTP. A copy of our AT review is attached. Please contact me if you have any questions concerning this review. JN:gh Attachment Kenansville A.T. Review Summary of Modeling Procedure Introduction The Town of Kenansville's Wastewater Treatment Plant is permitted to discharge 0.17 MGD of domestic wastewater into Grove Creek. Grove Creek is located in the Lower Yadkin River Basin and has a stream clas- sification of C-Swamp. This classification denotes that the waters' are suitable for fish and wildlife propagation, secondary recreation, and agriculture, and generally have low velocities due to the topography. DEM's "Level B" Model was used to simulate the impact of Kenansville's discharge to these receiving waters. Model Input The following data and/or methods were used to develop model input: I. Flows Headwaters: Using USGS station #02.1078.8880, Grove Creek at Kenansville, NC: S7Q10 = 0.5 cfs W7Q10 = 1.6 cfs QA = 19 cfs Using USGS station # 02.1078.9150, Grove Creek near Kenansville, NC, approximately 6.5 miles downstream: S7Q10 = 0.9 cfs W7Q10 = 3.0 cfs QA = 34 cfs II. Runoff Segment 1, Reach 1: S7Q10 = (0.9 cfs - 0.5 cfs) / 6.5 mi = 0.062 cfs/mi W7Q10 = (3.0 cfs - 1.6 cfs) / 6.5 mi = 0.215 cfs/mi QA = (34 cfs - 19 cfs) / 6.5 mi = 2.31 cfs/mi III. Slope From USGS 7.5 minute series, Kenansville Quadrangle: Segment 1, Reach 1: Slope = 4.2 fpm IV. Velocity Velocities were estimated from DEM's velocity regression equation: 0.75 029 0.35 V = [0.124 * (Qact) * (slope). ] / (Qavg) where Qact = 7Q10 + design flow Q avg = average stream flow A minimum velocity of 0.1 fps is used for streams with slope > 1 fpm. Segment 1, Reach 1: Velocity = 0.100 fps V. Design Temperature Design temperature was estimated from DEM's design temperature regression equations: Summer temperature: SDT = 25.848 - (0.001088 * elev) + (0.001232 * DA) - (5.1969 * 7Q10 yield) = 26°C Winter temperature: WDT = 15.805 - (0.00084 * elev) + (0.00036 * DA) - (1.043 * 7Q10 yield) = 16°C VI. BOD Decay Rate, K1 K1 was estimated from the equation: K1 @ 20°C = 0.35 + [(velocity/depth) * N) where N is the coefficient of bed activity and N = e (-2.8501 + (0.5980 * in (slope)) N varies from 0.1 for stagnant waters to 0.6 or higher for rapidly flowing streams. K1 values were then corrected to design temperature by: K1 @ 26°C = K1 @ 20°C * (1.047) 26°C - 20°C Segment 1, Reach 1: K1 = 0.48/day VII. Reaeration coefficient, K2 K2 was estimated by using the Tsivoglou equation for streams with less than 10 cfs. K2 = 1.8 * slope * velocity Correction to design temperature is by: K2 @ 26°C = K2 @ 20°C * (1.022) 26° C - 20° C then the K2 values are: Segment 1, Reach 1: K2 = 0.86/day VIII. Upstream and Background Concentrations Upstream water quality is assumed to have a BOD (ultimate) concentration of 2 mg/1 and a DO concentration of 90% saturation. These values are also assumed for the background concentrations in the watershed runoff entering the stream. Background CBOD = 2 mg/1 AT 26°C, [DO] @ 90% saturation = 7.4 mg/1 AT 16°C, [DO] @ 90% saturation = 9.87 mg/1 IX. Assigned Limits Based on the Level B analysis, the following limits were assigned to the Town of Kenansville: Summer Limits Winter Limits 5-Day BOD (mg/1) 11 14 22 28 NH3-N (mg/1) 3 2 6 4 Dissolved Oxygen (mg/1) 6 - 6 ' 5 5 . Total Suspended Solids (mg/1) 30 30 30 30 Fecal Coliform (#/100 ml) 1000 1000 1000 1000 pH (S.U.) 6-9 6-9 6-9 6-9 The facility can choose either set of limits for their final NPDES permit, as they represent the same ultimate BOD. 103+ANsvnLE WV/Tr QWr0.17 MGD w.c. USGS 02.1078.8880 DA:21.2 mil S7Q10z0.5 cfs W7Q10=1.6 cfs QA:19 cf s BUCKSKIN SWAMP GROV TEA SWAMP SEGMENT 1 REACH 1 6.5 mi. . FIGURE 1. TOWN OF KENANSVILLE WWTP CRE • USGS 02.1078.9150 DA=38.2 mi 2 37Q10= 0.9 cfs W7Q10s3.0 cfs QAs34 cfs No:dwst Ceps Pax Rives MEMORANDUM TO: THRU: FROM: DIVISION OF ENVIRONMENTAL MANAGEMENT June 3, 1987 Trevor Clements Technical Support Unit Water Quality Section Allen Wahab, Supervisor Local Planning Management Unit [[ Daniel Blaisdell !'�"J Local Planning Management Unit SUBJECT: Kenansville 201 Facilities Plan AT Checklist Project No. C370591-01 Relative to my April 1, 1987 memo regarding the subject, it is requested that the AT checklist for the Town of Kenansville be developed using a plant acity of 0.170 mgd and amended effluent limits of BOD5 11/22 winter summe , and Nh3 3/6'+Winter summe which correspond to a pending NPDE nit modification. It is a so r-• ested that the checklist resent equivalent limits of BOD5 14/28 me summer and Nh3 2/4 inte s er. Please return the completed checklist and related documentation no later than June 15, 1987 so that we can complete our portion of the AT review and conclude the overall review of the Kenansville 201 Plan Amendment. If you require any additional information please call me at 3-6900. DMB/jh cc: Wilmington Regional Office Reg Sutton LPMU GPF ,ere w45 cvw e,'or ca- ca /44rrcj e. C (1mtil5 {- 7cR Q •2 =- 1• � W�f! rh NPDES WASTE LOAD ALLOCATION PERMIT NO.: NCO() '?a G`,y FACILITY NAME: �wn 04- GCC44.17 S VI11L Facility Status: ( EXISTIN ' PROPOSED (circle one) Permit Status: RENEWAL �IFICATION )UNPERAQITED NEW (circle one) Major Minor Pipe No 00 I Design Capacity (MGD)• 017 Domestic (% of Flow)- 1 d0 Industrial (% of Flow). Comments: RECEIVING STREAM: Grove Creek Class• C - ` p Sub -Basin- O 3 - , _ Z7- Reference USGS Quad: 4.27 N w (please attach) County- 3)ur Ur) Regional Office: As Fa Mo Ra Wa Wi WS (circle owe) Requested By: + �� e 1 Date- � 7 \ I Prepared By ► _ Date: S 21- 7 Reviewed By: �_�.. !�'Date: 5-2Z-S*. Modeler Date Rec. # ' . D ✓ 5/ /d 7 i7L°Co Drainage Area (mi2) 21. a- Avg. Streamflow (cfs)- / 7Q10 (cfs) ILL -Winter 7Q10 (cfs)f 30Q2 (cfs) Toxicity Limits: IWC % (circle one) Acute / Chronic Instream Monitoring: Parameters %DO) '6e / � � Upstream LocationSI / 30 / Downstream - Location 2 Effluent Characteristics Summer Winter BOD5 (mg/1) 1/ 2 - NH3 N (mg/1) ,3 D.O. (mg/I) (0 5 TSS (mg/I) 0 3 U _30 F. Col. (/ 100m1) / 0 00 j0 00 pH (SU) G-% G -9 Request No. . 402/0 W(STELOAD ALLOCATION APPROVAL FORM ------- Facility Name TOWN OF KEN(. I',aSV 1 L..L..E Type of Waste : DOMESTIC Status : EXISTING • Receiving Stream : GROVE CREEK Stream Class . C--SWF Subbas :i. n . 010622 County : 1:11..)i t._ir,.I Drainage Area (sq rni) : 21.2 Regional Office : WI:LMINGTON Summer 7010 (c.fs) : 0.5 Requestor DALE OVERC1ISI-I Winter 701.0 (cfs) : 1.6 I:� ._. � Average D ct 'l; F: C+ I' Request �l + i=S i Flow ((::: fs) . 19 Quad ., 3002 (c::fs) . RECOMMENDED EFFLUENT LIMITS : SUMMER WINTER lflasteflc:+w (mgd) : 0.17 0.17 5-Da;, BOD (mg/ 1) : 11 82 Ammonia Nitrogen ((rrg/i.) : 3 6 Dissolved Oxygen (mg/1): 6 TSS (mg/l.) : 0 30 RECEIVED Fecal C;ol i.tc+rm (#/1.00(n1.) : 1000 1000 pH ('SU) : 6-'.9 6-9 MAY 8 1987 Wilmington Regional Office MONITORING Upstream (Y/N) : Y Location: SR 1301 Downstream (Y/N) : Y Location: E:T 11 DEM SEE E ATTACHED GRAPH FOR OTHER COMBINATIONS OF I-cb1:)5 AND NHS-N. / Pra,ieGt .".a.er , /yilolo..%l Let..,;s/ w43 net ; ; ed the Z�'f�se, �- . 1; eleurc A a.ei d e e� 0(e t- ; r ej a►^ i t A a o 1 Pia.,-, a-..Y+ a., Q/„,, z.s O JcJ r-C $ 4-o f t 4a.,-r► . (` 31/1/p 7 I,ke a .-7ec,ess�7 a s 091C Recommended by Reviewed by: Tech. ('_h . u ;pert Supervisor eg:i.onal Supervisor Permits &: Engineering - Date Date Date Date �i.EASESIG f2_0 i c..gS �v.N6 5, 19 8 7 �a�►Sv>>�er top., 4 IH3-N CO 1y1c. i0 S z s tJU Zo SUMMER @ 0.17 MGD ---------- MODEL RESULTS Discharger : TOWN OF KENANSVILLE Receiving Stream : GROVE CREEK The End D.O. is 6.84 mg/l' The End CBOD is 1.42 mg/l. The End NBOD is 0.00 mg/l. Segment 1 Reach 1 / ��T� �� -- _ - . . ' ' b^ � ��c`�x�'t3 v � WLA WLA WLA DO Min CBOD NBOD DO Waste Flow (mg/1) Milepoint Reach # (Mg/1) (mg/1) (mg/1) (mgd) 5.06 1.80 1 ��/�Tl �J~^�� U = 30 0'00 ^6.00 0.17000 V-n /I - VI • : • MODEL SUMMARY DATA *• • Discharger o TOWN Of KENANSV I LLE Receiving Stream : GROVE CREEK Summer 7010 a 0.5 Design Temperature: 26. Gc..tbb-tsin : 030622 Stream Class: C—SWP Winter 7010 a 1.6 LENGTH SLOPE! VELOCITY DEPTH: K1 1 K1 1 K2 1 K2 KN 1 KN 1 KNR KNR 1 mile ! ft/mil fps ft !design! 320° !design! a20° !design! a20° !design; a20° 1 Segment 1 1 6.501 4.201 0.100 0.80 1 0.48 1 0.37 1 0.86 1 0.761 0.00 1 0.00 0.00 0.00 Reacts 1 1 1 1 1 1 1 1 1 Flow 1 C13C)D 1 N1tt3D 1 D..Ci.. 1 cfs 1 mg/1. 1 mg/ 1 1 mg/1 Segment 1 Reach :!. Waste 1 0.264 ! 30.000 1 0.000 1 6.000 laea d w t er- s 1 0.500 2.000 1 0.000 1 7.400 Tributary 1 0.000 1 0.000 1 0.000 1 0.000 * Runoff 1 0.062 1 P.000 1 0.000 1 7.400 } * Runoff flow is in cfs/mile ^ ` Beg # | Reach # | Seg Mi D.O. CBOD | NBOD Flow | 1 1 0.00 6.92 11.66 0.00 0.76 1 1 ~0.10 6.66 11.25 0.00 0.77 1 1 0.20 6.43 10.85 0.00 0.78 1 1 0.30 6.22 10.47 0.00 0.78 1 1 0.40 6.03 10.10 0.00 0.79 1 1 0.50 5.87 9.74 0.00 0.79 1 1 0.60 5.73 9.40 0.00 0.80 1 1 0.70 5.60 9.07 0.00 0.81 1 1 0.80 5.49 8.75 0.D0 0.81 1 1 0.90 5.40 8.45 0.00 0.82 1 1 1.00 5.32 8.16 0.00 0.83 1 1 1.10 5.25 7.87 0.00 0.83 1 1 1.20 5.19 7.60 0.00 0.84 1 1 1.30 5.15 7.34 0.00 0.84 1 1 1..40 5.11 7.09 0.00 0.85 1 1 1.50 5.09 6.85 0.00 0.86 1 1 1.60 5.07 6.61 0.00 0.86 1 1 1.70 5.06 6.39 0.00 0.87 1 1 1.80 5.06 6.17 0.00 0.88 1 1 1.90 5.06 5.97 0.00 0.88 1 1 2.00 5.07 5.77 0.00 0.89 1 1 2.10 5.08 5.57 0.00 0.89 1 1 2.20 5.10 5.39 0.00 0.90 1 1 2.80 5.12 5.21 0.00 0.91 1 1 2.40 5.15 5.03 0.00 0.91 1 1 2.50 5.17 4.87 0.00 0.92 1 1 2.60 5.21 4.71 0.00 0.92 1 1 2.70 5.24 4.55 0.00 0.98 1 1 2.80 5.28 4.40 0.00 0.94 1 1 2.90 5.32 4.26 0.00 0.94 1 1 3.00 5.36 4.12 0.00 0.95 1 1 3.10 5.40 3.99 0.00 0.96 1 1 3.20 5.44 3.86 0.00 0.96 1 1 3.30 5.49 3.74 0.00 0.97 1 1 3.40 5.53 3.62 0.00 0.97 1 1 3.50 5.58 3.50 0.00 0.98 1 1 3.60 5.62 3.39 0.00 0.99 1 1 3.70 5.67 3.28 0.00 0.99 1 1 3.80 5.72 3.18 0.00 1.00 1 1 3.90 5.76 3.08 0.00 1.01 1 1 4.00 5.81 2.98 0.00 1.01 l 1 4.10 5.86 2.89 0.00 1.02 1 1 4.20 5.91 2.80 0.00 1.02 1 1 4.30 5.95 2.72 0.00 1.03 1 1 4.40 6.00 2.63 0.00 1.04 1 1 4.50 6.05 2.55 0.00 1.04 1 1 4.60 6.09 2.47 0.00 1.05 1 1 4.70 6.14 2.40 0.00 1.05 1 1 4.80 6.18 2.33 0.00 1.06 1 1 4.90 6.23 2.26 0.00 1.07 1 1 5.00 6.27 2.19 0.00 1.07 1 1 5.10 6.31 2.13 0.00 1.0B 1 1 5.20 6.36 2.06 0.00 1.09 1 1 5.30 6.40 2.00 0.00 1.09 1 1 5.40 6.44 1.94 0.00 1.10 1 1 5.50 6.48 1.89 0.D0 1.10 1 1 5.60 6.52 1.83 0.00 1.11 1 1 5.70 6.56 1.78 0.00 1.12 1 1 5.80 6.59 1.73 0.00 1.12 1 1 5.90 6.63 1.68 0.00 1.13 � 1 A, oo A /,17 1 An o oo 1 14 ~ 1 6.10 6.70 1.~ 59 0.00 �.14 1 6.20 8.74 1.54 0.00. 1.15 1 6.30 6.77 1.30 0.00 1.15 , 1 1 6.40 6.81 1.46 0.00 1"16 1 1 6"50 6"84 1.42 0.00 1.17 Discharger Receiving Stream MODEL RESULTS : TOWN OF KENANSVILLE : GROVE CREEK The End D.O. is 7.95 mg/l. The End CBOD is 3.08 mg/1. The End NBOD is 0.00 mg/l. WINTER @ 0.17 M8D PROTECTED @ 2X SUMMER LIMITS - WLA WLA WLA DO Min CBOD NBOD DO Waste Flow (mg/1) Milepoint Reach # (mg/l) (mg/1> (mg/1) (mgd) Segment 1 6.20 1.80 1 Reach 1 60 0.00 5.00 0.17000 w1 *** MODEL SUMMARY DATA *** Discharger n TOWN OF KENIANSV 1 L_L_L- Receiving Stream : GROVE CREEK Summer 7010 : 0.5 Design Temperature: 16. Subbasit)) a 0:30ar' Stream Class: C—SWP Winter 7010 a 1.6 !LENGTH' SLOPE! VELOCITY i DEPTH! K1 ; K1 K2 K2 1 KN 1 KN 1 KNR 1 KNR mile 1 ft/mil fps 1 ft =design 120° design; 020° !design: 020° 4designl 320° Segment 1 1 6.501 4.201 0.100 0.99 1 0.30 1 0.36 0.69 0.761 0.00 1 0.00 0.00 1 0.00 Reach 1 = 11 1 1 Flow 4 CBOD i IVE#CID 1 D.O. 1 cfs i mg/1 1 mg/1 1 mg/1 Segment 1 Reach 1 Waste 0.264 1 60.000 i 0.000 1 5.000 Headwaters! 0.500 I {�}#��#�� ; 0 .. 000 ; 9.8'; 0 Tributary s 0.000 i {_) ., #�} #�)#�) i 0.000 i 0.000 Runoff I 0.215 P.000 ; 0.000 { 8.880 * Runoff flow is in cfs/mi.1e � MODEL RESULTS Discharger : TOWN OF KENANGVILLE Receiving Stream : GROVE CREEK The End D.O. is 7.39 mg/l. The End CBOD is 4.00 mg/l. The End NBOD is 0.00 mg/l. DO Min (mg/1) Milepoint Reach # WINTER @ >.17 MGD/UNPROTECTED WLA WLA WLA CBOD NBOD DO Waste Flow (mg/1) (mg/l) (mg/1) (mgd) Segment .1 5.09 1.90 1 Reach 1 85 0.00 5.00 0.17000 m1--(c-‘1)( 3.: JC7- Strect, : gi'?/1/ CKE LIC 8CacI, Slope. C4tcu cation s /2 65-L s-, 0 - _ELF 2 _757,,, 021 s, - .9,s1t _ ‘. s - -item tuM dirt .2d ni 0 I (rill, �, 3 /m i /6 A, 4ist SI aft. (S.62- Z,3/ Z.?T6 S ,off 2.z r° 2, 77 _ a. 3J ..,JrAet OF pn(•L;.TPIoN: Artawtde (208) Planning Area: Facilities (201) planning Area: ��N e -( /CA/4JLJ; lh 4 air! lacacioa P{sp (Xa=os of a wad or a good sketch) Llsvatlon vs. River Nile • 1River Mils i A. ]IEC TV't'R+ -N4 l?/V d £ lJ F E K-- Classification: C — A 7Q10 haadwatar Flow(cfs) as - Pc sour« of Flow Into. (DSOs Station 4) a io7LI88a s. ASSIMrtATIVL C.PACTl7 DATA 1. ltatar Surface Slaps (ftiail x Stream %salacity (fps) Stream Depth (ft) Elevation 4 Discharge Pt. (ft) Drainage Area (sg. mi.) 7010 Yield (cfs/ai2) X Design Ta++perature (cr.) aC Daoxygenation Plats (ICI Ease e)' X Daoxygenation Plata (XS Iase t)' A Aeaeration Rats (X2 e)' or escape mat. N n. Strums D.0. (mg/1) I.W. Strum Quality - MOD(s4/1) o.o. (sa/1) loom (mg/1) C. REQUIRED EFFLUENT' LIMITS X Design flow (map) X I5 (mg/1) AmmonX Di lvtd a Nitrogen (mil) 'lbtal Suspended Solids (sg/1) P"ecal Colifoels (4n00 al) PH (S.D.) _ Other Wsat Om DXO w /• 4 °9005 + 4.6 11H3 (Pater UIt CXD:HODS ratio) TYPE Or ANALYSTSDesktop Other (If b cicgro:snd wet*ar gualityi or calibration D.O., SOD. and NH3 graphs or attar stream data available, please attach a sisssary or data mural-) E. Najar Trib. Th • (Flow, mot .D.O., err.) 3 442 O. 0.8 O . dig B 26 "c .▪ 14 24'c X F. war War discharge info. (Flow, 3005, NH3, D.O., etc.) G. Commits: EPA WLA: (1 0D5 - 11H3 - DO) Statas WtA: (HOO5 - HH3 - 1:10) . • 2f reaction rates vary downstr am. note and explain in oonm nt section. X 771t:c d.. .. mwA = be InciJde ;n 11•1• r' e:t- �� nigral/41 MAYOR Donald E. Bottles COMMISSIONERS Earl Hatcher, Mayor Pro-Tem Wlltlam P. Fennell James°. Johnson Betty C. Long Ronnle Bostic TOWN CLERK Mary Anne Jenkins POLICE CHIEF W. Tyson Bostic TOWN ATTORNEY Wiliam E. Craft PUBLIC WORKS DIRECTOR Stanley K. Ricker rnum of Entatuntillt P.O. BOX 420. 109 W. HILL STREET. KENANSYILLE. N.C. 29349 Telephone 919.298-0369 Mr. Ted Bush N. C. Division of 7225 Wrightsville Wilmington, North Dear Mr. Bush: May 14, 1987 Environmental Management - Avenue Carolina 28403 Designated as: A Bicentennial Community Governor's Award Town National Historic Dtu,kt Governor's Conmesrwlty of Excellence SUBJECT: Request for Designation of Effluent Channel Wastewater Treatment Plant Town of Kenansville Duplin County, N. C. Please accept this letter as the Towl's request for the designation of the ditch at the wastewater treatment plant as an "effluent channel" pursuant to Regulation 2B.0202 Section 8. The ditch is located entirely on the Town's property and contains no natural stream flow. A protective device will be installed at the end of the ditch to prevent fish from entering the canal after such time that designation of the ditch as an "effluent channel" has been approved. If you have any questions, please do not hesitate to contact me. F"TL: bu cc: Daniel Blaisdell, DEM, Raleigh RECEI I MAY 2 2 tQR7 TECHNICAL SERVICES BRANCH Sincerely yo Donald (E. 'Suttles RECEIVED MAY 201987 Wilmington Regional Office DEM KEWWP.TL7 "Proud o, j Its Past; Pride in Its Future" MEMORANDUM TO: April 1, 1987 Trevor Clements Technical Support Unit Water Quality Section THRU: Allen Wahab, Supervisor Local Planning Management Unit FROM: Daniel Blaisdell Local Planning Management Unit SUBJECT: Kenansville 201 Facilities Plan AT Checklist Project No. C370591-01 This is to request that an AT checklist be completed for the subject project. The selected alternative is to upgrade the existing treatment plant, on site, with no additional capacity and continue discharging at the present point on Grove Creek. The current permitted capacity of the plant is 0.170 mgd with limits of BOD5 28/20 winter/summer, NH3 13/5 winter/summer and TSS 30. For your convenience I have enclosed a topographic map depicting the current discharge Point. Please return the completed checklist and related documentation by April 30, 1987, so that we can complete our portion of the AT review and conclude the overall review of the Kenansville 201 Plan Amendment. Please call me at 3-6900 if you need more information. DMB/jh Enclosure cc: Wilmington Regional Office Reg Sutton LPMU GPF .0. , 0 SCALE 1:24. 000 KxOauETERS 1 METERS .5 0 MILES Burn 2 2000 403 0 1000 2000 300 4000 5033 E000 7003 IMO 1000 10 DX FEET CONTOUR INTERVAL 2 METERS NATIONAL GEODETIC VERTICAL DATUM OF 1929 CONTROL ELEVATIONS SHOWN TO THE NEAREST 0.1 METER 1 — — r — r= -'-' -.• II BM 27.2 KENANSVILLE, N. C. NW/4 KENANSVILLE 13' QUADRANGLE N3452.5—W7752.5/7.5 1980 DMA 5433 IV NW —SERIES V342