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Home My WebLink AboutNC0045128_Wasteload Allocation_19960418NPDES WASTE LOAD ALLOCATION PERMIT NO.: NCO045128 PERMITTEE NAME: Alamance County Board of Education FACILITY NAME: Sylvan Elementary School Facility Status: Existing Permit Status: Modification Major Minor -1 Pipe No.: 001 Design Capacity: 0.003 MGD Domestic (% of Flow): Industrial (% of Flow): 100 % 1 Comments: SEE-,-IY.Gc{'e,P W1nA.�e. S (tAE•` ) HA} n1a L o.9 t —e waor ape %.+�Iw ALM oz.o9 .99uo 3.Feck coueCALult 5o, pa{wyo Wvz.s„? rmrx.. r.o �7n.o . p .J70.�o •, p 3ti�0:0 ' RECEIVING STREAM:Canc Creek Class: C-NSW Sub -Basin: 03-06-04 Reference USGS Quad: D 21 NW (please attach) County: Alamance Regional Office: Winston-Salem Regional Office Previous Exp. Date: 2/29/96 Treatment Plant Class: I Classification changes within three miles: Requested by: Susar Wilson (%VA, Date: 3/6/96 Prepared by Date: 1,5 p a,r,,, kofj, Reviewed by: Date: ��9� kA11� _ Modeler Date Rec. # SGp 3 ll 5v g'�SCe Drainage Area (mil. ) t e , L Avg. Streamflow (cfs): vi •0 7QI0 (cfs) O.-L. Winter 7Q10 (cfs) 9,-. 30Q2 (cfs) Toxicity Limits: IWC % Acute/Chronic InstreamMonitoring: N0-r KgSautesa Parameters Upstream Location Downstream Location Effluent Summer Winter Characteristics BOD5 (m ) 30 30 NH -N (mg/I) 3 moN,to2 D.O. (mg/l) TSS (mg/i) 30 g F. Col. (/100 ml) ZO o �o pH (SU) 6-1 6 - Res 1 Oelrai... p Gn0zt E L MO"Aor_ 0&0 a1 • P s C 1✓ 0war40 r,)Dqrt idCPL M—l'ta Y' C°G w-ONrt 0 ,n6,,j r, 77 Comments: k MEMODATE: t TO: �� (k SUBJECT: -- S-t2�1M � AN� ntt 9 �s� t C�! i (Z ` UCS T c� J� (�1 C (� LAM MAN i � e1E � �pL � r o 00 P� 49 n �t��'`'` Cow-Lf�NcE (' P, ALSO -�Mk From: S""'j W ' �STATE4 �Department of Environment, h Carolina Nort t Health, and Natural Resources 09 printed on Recycled Paper Alamance County'Schools. ; P.O. Box 358 609 Ray Street `• : 1= Graham, North Cadre 27253 f Telephone: 910-574y 6 4' 2 -y Fax: 910-570- 64 B.S•':r H.m Rogereo January 12 ,1996 Mr -David A. Goodrich, Supervisor NPDES Group State of North Carolina =� _ Department of Environment, Health and Natural Resources Division of Environmental Management, Subject: Change. in. Draft Permit; Permit :Nd.:' NC0.0451 :8 - - Sylvan Elementary. - r :r. 'Alamance County :Y Dear Mr .Goodrich: "r This . is a reply to our draft- NPDES permit far. SylVan,Elementary'. -i No. NCO045128. I wish to change -monitoring f1Qw. from 0014 MGD :tt} .0030 MGD. Due to the fact that our well .flow meter is note a' -true . ; representation of our Efflunent flow. Due - to ' the `fact that the house across the street is used by the cast in. Spring of year,When. the'_ show`-, SWORD OF PEACE is being put on•,tOhe house has -its oji septic. Also due to irrigation of lawn, cleaning ect,.:-. t We are installing a Dosing counter in dosing tank toobtain accurate flow at this discharger s When reveiwing old permit from 1974, The flow was with 200 students,. We now have 225 students. The sand bed i.s 165Qsq.• .ft The school has a cafeteria, We are allowed by- caculation Hgatpe= student,Nhich is 2700 gpd. This puts 1.6ga1 per sq ft.t:, If you hqve . any more, quest ions or -comments ' please coritact ' me_ at 910- 570-6482. H.M.Ro_ gers, Alamance Coounty Schools_ H . M. Rogers . (ORC, r L N c't cc: Mr.Charles 0. Jefferies=- _-- Associate Superintendent an equal oppo4unit}r empbver - > � Staff Review and Evaluation NPDES Wastewater Permit FACILITY INFORMATI Facility Sylvan Elementary School NPDES No. NCO045128 Design Flow (MGD) 0.00146 Facility Class I C7vHo4 STREAM CHARACTERISTICS Stream Name Cane Creek Stream Class C NSW Drainage Area (mil) 15.2 S7Q10 (cfs) 0.2 W7Q10 (cfs) - 30Q2 (cfs) - IWC (%) 1.12 Proposed Changes Parameters Affected Basis for change(s) Monitorin& Fr encies Amm /WET limit Limit N PME Compliance Schedule: Special Condition(s): STANDARD CONDITION FOR DISCHARGES TO NSW WATERS. Permits & Engineering Comments: Recommend renewal of existing limits. Due to high dilution at the point of discharge, no NH3- N/tox choice will be given. Previous information indicates that this is a Class I facility and permit monitoring frequencies reflect this classification. No instream monitoring is required. The facility has had several flow violations in the past year. t Preparedby: -- Regional Office Evaluation and Recommendations: u i Y-- : =:4�2 01,0 June 30. 1995 MEMORANDUM: TO.: Jav,cas THROUGH: Steve Maunev. Water ouality Supervisor /o}� FROM: Jim Johnston SUBJECT: Permit Renewal. Alamance County Schools Altimawhaw-Ossipee E.S.? NCO045161 Western High School, NCO045144 Western Middle School, NCO031607 B.E. Jordon E.S.. NCO045152 Sylvan E.S. NCO045128 The above schools in Alamance County have requested permit renewal. No changes have occurred at the sites since the last staff reports. Attached are copies of the previous staff reports. If you have any questions, please contact me. It is recommended that the permits for the above schools be renewed in accordance with Division policy. CC: Tech. Services County Health Dept. Central Files WSRO Facility Name: NPDES No.: Type of Waste: Facility Status: Permit Status: Receiving Stream: Stream Classification: Subbasin: County: Regional Office: Requestor: Date of Request: Topo Quad: RBe�T "E8 APR o 8 19, FACT SHEET FOR WASTELOAD ALLOCATION Request # 8456 Sylvan Elementary - Alamance County Board of Education NCO045128 Domestic - 100% Existing Modification Stream Characteristic: Cane Creek USGS # 02.0968.8425 C - NSW Date: 1986 03-06-04 Drainage Area (mi2): 15.2 Alamance Summer 7Q10 (cfs): 0.2 Winston - Salem Winter 7Q10 (cfs): 0.7 Wilson Average Flow (cfs): 14.0 3 / 11 / 96 30Q2 (cfs): D 21 NW IWC (%): 2.4 % Wasteload Allocation Summary (approach taken, correspondence with region, EPA, etc.) Increase in flow designation due to reassessment of plant capacity and does not constitute an 'actual' increase in discharge. Facility currently measuring discharge using water bill records. As the watering of an athletic field is included in the water bill, this method is not very accurate. ty Previous flows were used to remodel discharge at newly determined discharge c�EC E I V G D No residual chlorine limit recommended per information given to permi".c D e p f, of F H N R No change in limits, (other than flow) recommended. AFR - 1 1996 W st.on-Salem Special Schedule Requirements and additional comments from Reviewers: riS 0 n a fif I C8 A Recon Reviewed Instream Regional Permits 8 RETURN TO TECHNICAL SUPPORT BY: Date::z mAgri. +996 Dater Date: Date: APR 2 4 1996 Existing Limits: Monthly Average Summer Winter Wasteflow (MGD): 0.0014 * 0.0014 BODS (mg/1): 30 30 NH3N (m' g/1): monitor monitor DO (mg/1): - - TSS (mg/l): 30 30 Fecal Coliform (/100 ml): 200 200 PH (SU): 6-9 6-9 Residual Chlorine (µg/1): monitor monitor Oil & Grease (mg/1): - - TP (mg/1): monitor monitor TN (mg/1): monitor monitor Temperature (°C): monitor monitor There shall be no discharge of floating solids or visible foam in other than trace amounts. * Flow monitoring should be conducted prior to the wastewater treatment plant or at the effluent. Recommended Limits: Monthly Average Summer Winter WQ or EL Wasteflow (MGD): 0.003 * 0.003 * BOD5 (mg/1): 30 30 EL NH3N (mg/1): monitor monitor DO (mg/1): - - TSS (mg/1): 30 30 EL Fecal Coliform (/100 ml): 200 200 PH (SU): 6-9 6-9 Residual Chlorine (µg/1): monitor monitor OR & Grease (mg/1): - - TP (mg/1): monitor monitor TN (mg/1): monitor monitor Temperature (°C): monitor monitor There shall be no discharge of floating solids or visible foam in other than trace amounts. * Flow monitoring should be conducted prior to the wastewater treatment plant or at the effluent. Parameter(s) affected: Limits Changes Due To: Flow re -assessed plant capacity Parameter(s) are water quality limited. For some parameters, the available load capacity of the immediate receiving water will be consumed. This may affect future water quality based effluent limitations for additional dischargers within this portion of the watershed. OR x No parameters are water quality limited, but this discharge may affect future allocations. INSTREAM MONITORING REQUIREMENTS Upstream Location: not required Downstream Location: not required Parameters: Special instream monitoring locations or monitoring frequencies: MISCELLANEOUS INFORMATION & SPECIAL CONDITIONS Adequacy of Existing Treatment Has the facility demoystrated the ability to meet the proposed new limits with existing treatment facilities? Yes i, No If no, which parameters cannot be met? Would a "phasing in" of the new limits be appropriate? Yes _ No If yes, please provide a schedule (and basis for that schedule) with the regional office recommendations: If no, why not? Special Instructions or Conditions Wasteload sent to EPA? (Major) _ (Y or N) (If yes, then attach schematic, toxics spreadsheet, copy of model, or, if not modeled, then old assumptions that were made, and description of how it fits into basinwide plan) Additional Information attached? (Y or N) If yes, explain with attachments. P 9 a Ne--$ fibb °s p Tu 1+ 8/ V r!•V � � d a 4` P �.� p�runrt NawmAllp wavta (Amw bEEV 5tRxN(hlrNcd, bu+ tt•� P-¢ ttt R�vESi� p,� SON Fr,Pd,- f�Du� lmLuljo�, hC.t,"l INC2=fQ--,C rN IIOW, bur t\.E 2htFt� C&PAU}l way -tu b� 1p(WFt- -tl.N..l pcevlais(? PE�t—ftk ) T -Nc.z� P(ouA�., Npo 414 Not " J qN " f0Ctc1A, lout/ ItiICR.P%YCs r rt Who 'tl,E E.xIStrN�� ouJS_ -TW-- %P61N P(At) NL:,tv, - add(&Ss A{ V-S W"C-Vja;rt Ox SMall GAtbcl Qal C-s 1rkC- +1v3 CI E. 40v NtR(ZK pJt5) - * raxtUlti OVA5 yule( No c1.41NC- boat t JXVlet Ibe la65()Nedk SUMMER PAPER FLOW INCREASE ---------- MODEL RESULTS ---------- Discharger : SYLVAN ELEMENTARY - ALAMANCE COUNTY Receiving Stream : CANE CREEK ---------------------------------------------------------------------- The End D.O. is 6.20 mg/l. The End CBOD is 0.80 mg/l. The End NBOD ---------------------------------------------------------------------- is 0.27 mg/l. WLA WLA WLA DO Min CBOD NBOD DO Waste Flo (mg/1) Milepoint Reach # (mg/1) (mg/1) * (mg/1) -- (mgd) --------- Segment 1 ------ 5.81 --------- 0.85 ------- ---- 2 ---- Reach 1 45.00 90.00 0.00 0.00300 Reach 2 0.00 0.00 0.00 0.00000 SUMMER PAPER FLOW INCREASE I Seg # I Reach # I Seg Mi I D.O. ( CBOD I NBOD I Flow I 1 1 0.00 7.13 2.98 3.02 0.20 1 1 0.10 6.80 2.79 2.69 0.21 1 1 0.20 6.54 2.61 2.40 0.21 1 1 0.30 6.34 2.45 2.14 0.22 1 1 0.40 6.21 2.31 1.92 0.22 1 1 0.50 6.11 2.17 1.72 0.22 1 1 0.60 6.05 2.04 1.54 0.23 1 1 0.70 6.02 1.92 1.38 0.23 1 1 0.80 6.02 1.81 1.24 0.24 1 2 0.35 6.02 1.81 1.24 0.24 1 2 0.85 5.81 1.34 0.71 0.26 1 2 1.35 5.95 1.02 0.42 0.28 1 2 1.85 6.20 0.80 0.27 0.30 i Seg # ( Reach # I Seg Mi I D.O. 1 CBOD I NBOD I Flow I Seg # I Reach # I Seg Mi I D.O. I CBOD 1 1 0.00 7.13 2.98 1 1 0.10 6.39 2.63 1 1 0.20 5.88 2.33 1 1 0.30 5.54 2.07 1 1 0.40 5.33 1.84 1 1 0.50 5.22 1.64 1 1 0.60 5.18 1.47 1 1 0.70 5.20 1.31 1 1 0.80 5.26 1.18 1 2 0.35 5.26 1.18 1 2 0.85 5.35 0.67 1 2 1.35 5.77 0.42 1 2 1.85 6.20 0.29 Seg # I Reach # I Seg Mi I D.O. I CBOD SUMMER VELOCITIES WERE INPUT AT ONE-HALF CALCULATED RATES I NBOD I Flow I 3.02 0.20 2.42 0.21 1.95 0.21 1.57 0.22 1.27 0.22 1.02 0.22 0.83 0.23 0.68 0.23 0.56 0.24 0.56 0.24 0.20 0.26 0.09 0.28 0.05 0.30 1 NBOD I Flow I *** MODEL SUMMARY DATA *** Discharger SYLVAN ELEMENTARY - ALAMANCE COUNTYSubbasin Receiving Stream CANE CREEK Stream Class: C Summer 7Q10 0.2 Winter 7Q10 0.7 Design Temperature: 26.0 ILENGTHI SLOPE) VELOCITY I DEPTHI Kd I Kd I Ka I Ka i KN I KN I KNR I KNR I SOD I SOD I I mile I ft/mil fps I ft Idesigni @20 Idesigni @20 Idesignl @20 Idesignl @20 Idesignl @20 1 ------------------------------------------------------------------------------------------------------------------- I I I I I I I I I I I I I I I Segment 1 1 0.801 8.301 0.028 1 0.72 1 0.27 1 0.21 1 0.48 1 0.421 0.48 10.30 1 0.48 1 0.00 1 0.00 10.00 1 Reach 1 I I I I I I I I I I I I I ------------------------------------------------------------------------------------------------------------------- I I I I I I I I I I I I I I Segment 1 1 1.951 5.101 0.027 1 0.83 1 0.27 1 0.20 10.28 1 0.241 0.48 1 0.30 1 0.48 10.00 10.00 10.00 1 Reach 2 1 1 1 1 1 1 1 1 1 1 1 1 1 ----------------------------------------------------------------------------------------------------- 1 Flow 1 CBOD 1 NBOD 1 I cfs 1 mg/l 1 mg/l I Segment 1 Reach 1 Waste 1 0.005 1 45.000 1 90.000 I Headwatersl 0.200 1 2.000 1 1.000 1 Tributary 1 0.000 1 2.000 I 1.000 I * Runoff 1 0.040 I 2.000 1 1.000 Segment 1 Reach 2 Waste I 0.000 I 0.000 1 Tributary 1 0.000 ( 2.000 * Runoff ( 0.040 I 2.000 1 * Runoff flow is in cfs/mile D.O. mg/l I 0.000 7.300 7.300 7.300 0.000 I 0.000 1.000 I 7.300 1.000 I 7.300 : 030604 J I Cane ` , - � �c` � s�xwcame �l i � �� ,.1 , t) ) � � i_, s l� , < v �� (•� ! lii � � / �Sunu ))) vLf y � �.� � d � '�4 d � I. ' i i �✓ r � I Y (� i� _. <a u6 oPE,,� Ri �. � 7 J, N Niu � �I��i 1 �� .- �J�I. �_ � ✓ paer)o,oTQla 3cn <..� 7� - 1 .✓ / qp J_/l �s ( i�-1., _o ! /�I 1)��.,! •JJ � i %,. I ,�� f.. �, �.: ' �I.� r..e�\', n I \.� \ f l �y 1. .,, �,� \�� j�I��h'�lI is V /`ii JIA A/ I� _ ALAMANCI f0__ C AIIIAM �V � � � � �� , � �� 1, j •� x� �� r.., � �. .f1.0 d '1 r