The URL can be used to link to this page

Home My WebLink AboutNC0050342_Wasteload Allocation_19940613NPDES DOCIMENT SCANNING COVER SHEET NC0050342 Muddy Creek WWTP NPDES Permit: 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 13, 1994 This doct meat is printed oa reuee paper. - ignore arty ooateat oa the re -sr -erase aide DRAFT REQUEST PERMIT NO.: NC0050342 PERMITTEE NAME: FACILITY NAME: go-C Z LOUNS NPDES WASTE LOAD ALLOCATION Winston-Salem Forsyth County Utility Muddy Creek WWTP Facility Status: Existing Permit Status: Renewal with Modification Major Minor Pipe No.: 001 Design Capacity: 15.0 MGD* Domestic (% of Flow): 74 % Industrial (% of Flow): 26 % Comments: *Also flow increase to 21 MGD requested. EA is currently under review. rlp A RECEIVING STREAM: Yadkin River (001) and Muddy Creek (002) Class: 14 Tz? 44 Sub -Basin: 03-07-04 -*stA` Reference USGS Quad: D17NE (please attach) County: Forsyth Regional Office: Winston-Salem Regional Office Previous Exp. Date: 8/31/94 Treatment Plant Class: IV Classification changes within three miles: Requested by: Greg Nizich 6 5 k) Date: 3/16/94 Prepared by: f viz) (,d /1 Date: ( 6/9u% Reviewed by: `�' Tom-- �5 Date: 6 V/3/7V a Modeler Date Rec. # iial v An1aL, T44 Drainage Area (mil ) 11 g. Streamflow (cfs):1L 7 7Q10 (cfs)-{y/S, Winter 7Q10 (cfs)�5' 30Q2 (cfs) 11I '/ $ 1 f - % Acute Toxicity Limits: IWC i/.D hronic Instream Monitoring: -. /S, Yaojlz; . e(;sc ax17j -kvit10 ., lad Du, ebnflut '✓,. , Chops -, NN3-NI-ecul co/ , Parameters Upstream Downstream }� Location I do /s Da rn Location 9. 3 » ; . be %6w d;sc 4ag, Effluent Characteristics A t - 5 It) �' _- _ . 5 G&) L:0Oris(mg/1) ZS 2_S 7 S Z S NH3-N (mg/1) Awl i 1 / B.O. (mg/1) Mini i -tor AAA 1Ir i rn.ns ; *An vx.,n, ; --lon TSS (mg/1) 30 30 3 D 30 F. Col. (/100 ml) ZOO ZOO 7-Do ZOn pH (SU) 4,-9 -9 L-9 Ylteri. din mot ;1rrt 6,-9 144anl; lctl ,/hi 6s . ( qr; � l �� 44.4x; +icri s►tai r 47 TP (*La/2) ►rytely►;J, ,; I10, Tnl ( f -e) r3to11; Tirr, Men 4 kept cn;1rn ,k vtital fki At,n,; IVt )4 , It 1 g (, /.e) ritm:1 •lnr ; L wt e l a 12 ylAOl i 471 nun'l; Jr ] Ikon IITP Comments: 3 l Reviewed by Facility Name: NPDES No.: Type of Waste: Facility Status: Permit Status: Receiving Stream: Stream Classification: Subbasin: County: Regional Office: FACT SHEET FOR WASTELOAD ALLOCATION Muddy Creek WWTP NC00503452 74% Domestic, 26% Industrial Existing Renewal Yadkin River (A); Muddy Creek (B) WS-IV (A, B) 03-07-04 Forsyth Winston-Salem Request # 7794A Stream Characteristic: USGS # Requestor: Greg Nizich Date: Date of Request: 3/16/94 Drainage Area (mi2): Topo Quad: D17NE Summer 7Q10 (cfs): Winter 7Q10 (cfs): Average Flow (cfs): 30Q2 (cfs): IWC (%): W Wasteload Allocation Summary aik4 (�ot( - Z 1-4s eat`Al - facility is requesting renewal of their permit ,Fe 2 pi pe SY +•t• • w`AAJ - facility is currently meeting limits and instream monitoring shows no problems -re.la f - the second discharge to Muddy Creek (Pipe 002) is used as a backup when high water conditions in the Yadkin prevent discharge from Pipe 001. Discharge from Pipe 002 should be allowed only when flow at USGS gage 02116500 at Highway 64 on the Yadkin River near Yadkin College exceeds 5000 cfs - Betsy Johnson extended a QUAL2E model for the Archie Elledge WWTP to High Rock Lake to include this discharge, though little data was available for calibration. This model will be improved for the basin plan and some changes may be recommended when better data is available - reevaluated toxics according to new methods and discussed monitoring with Jeff Poupart in Pretreatment - some effluent monitoring requirements will be removed due to duplication in the pretreatment monitoring plan RECEIVED. N.C. Dept. o; L-iNF MP' ' 2 3 1S94 RegionRegionai JTfiice Special Schedule Requirements and additional comments fro Reviewers: r4-e_4(...• 1/ pc/Aivr Tv Coa/i7Nvz V)'77i Yer Tfs-7Ai ? Recommended by: / g 4 ,l Instream Assessment: Regional Supervisor: Permits & Engineering: 0211567980 (A) 10 0211590140 (B) 1/12/89(A); 1/10/89(B) 1967 (A); 186.5 (B) 554 (A); 55 (B) 854 (A); 74 (B) 1849 (A); 177 (B) 1115 (A); 95 (B) 4.0 (A); 30 (B) Date: _5 Date: Sha/ry Date: C - -2 —1 Date: RETURN TO TECHNICAL SUPPORT BY: J'JN 1 6 1994 2A- `lApx- 1SMao Existing Limits: Wasteflow (MGD): CBOD5 (mg/1): NH3N (mg/1): DO (mg/1): TSS (mg/1): Fecal Col. (/100 ml): pH (SU): Residual Chlorine (pg/1): Oil & Grease (mg/1): TP (mg/1): TN (mg/1): Recgmme_g1ed Limits: Wasteflow (MGD): CBOD5 (mg/1): NH3N (mg/1): DO (mg/1): TSS (mg/1): Fecal Col. (/100 ml): pH (SU): Residual Chlorine (pg/1): Oil & Grease (mg/1): TP (mg/1): TN (mg/1): CONVENTIONAL PARAMETERS Monthly Average Summer Winter 15 15 25 25 monitor monitor monitor monitor 30 30 1000 1000 6-9 6-9 monitor monitor monitor monitor monitor monitor Monthly Average Summer Winter 15 25 monitor Ivl�v�-�.-40✓ 30 200 6-9 monitor 15 25 monitor 30 200 6-9 monitor monitor monitor monitor monitor Limits Changes Due To: Change in 7Q10 data Change in stream classification Relocation of discharge Change in wasteflow Other (onsite toxicity study, interaction, etc.) Instream data New regulations/standards/procedures New facility information WQ or EL WQ EL EL Parameters) Affected x fecal coliforms (explanation of any modifications to past modeling analysis including new flows, rates, field data, interacting discharges) (See page 4 for miscellaneous and special conditions, if applicable) 3q — YApKsN gi vEK ' /S Map TOXICS/METALS Type of Toxicity Test Chronic toxicity (Cerodaphnia) ChV; Pollutant Analysis Existing Limit: 4% Recommended Limit: 4% Monitoring Schedule: Jan, Apr, Jul, Oct; annually gxisting Limits COD (mg/): Cadmium (ug/1): Chromium (ug/1): Copper (ug/1): Nickel (ug/1): Lead (ug/1): Zinc (ug/1): Cyanide (ug/1): Phenols (ug/1): Mercury (ug/1): Silver (ug/1): Recommended Limits Monthly Limit Quarterly Limit monitor Monthly Limit Quarterly Limit WQ or EL COD (mg/): Cadmium (ug/1): Chromium (ug/1): Copper (ug/1): Nickel (ug/1): Lead (ug/1): rAok t oV Zinc (ug/1): monitor Cyanide (ug/1): Phenols (ug/1): Mercury (ug/1): Silver (ug/1): WQ Limits Changes Due To: Parameter(s) Affected Change in 7Q10 data Change in stream classification Relocation of discharge Change in wasteflow New pretreatment and effluent monitoring information X Zn, Pb Failing toxicity test Other (onsite toxicity study, interaction, etc.) X 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 No parameters are water quality limited, but this discharge may affect future allocations. Lt&L 4161 A,YDr,n gleOMMildat vtti PPDE5 y i ntP iu6 A- 11,fN,4 Ca.t 6b,� i n SAerM.. 4 - iS A Gv INSTREAM MONITORING REQUIREMENTS Upstream Location: Idols Dam �t - Downstream Location: US-Highway-64- (o^1 is go/o tjt . aCCe-sSI 6 SGe pfv posc ol Sik owl Parameters: DO, conductivity, CBOD5, NH3 as N, fecal coliform, temperature, lead f4st ,/ ,1_ o Special instream monitoring locations or monitoring frequencies: monitor lead quarterly, all other parameters weekly MISCELLANEOUS INFORMATION & SPECIAL CONDITIONS Adequacy of Existing Treatment Has the facility demonstrated the ability to meet the proposed new limits with existing treatment facilities? Yesy `� 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: hint) z 'TAM ,'1 /10.v 1 42/At (v // O C7 aJ A7eC/OsE.Q .85/ H/•asie -S.4L_[M IS ''" 4- r//t£ ®cc/,vS't4[ell v7 0.4 /A {• �4- GA/go Gs) tf..' T-:-1 - edv/GlsoA/ CA0:y. W*TV-/N 7-4AZ L-tJcdT!OoJf , ' 2 /S is A7 / L �'� c . %/ o . Sii- w �� o,. AT %-/f c e / f e9. SdE ,e£drSEd /1or>' k.T1-( 1-aciT/vnf. If no, why not? Special Instructions or Conditions k ; S - p lust. Co.Hnt.let.4 o t p rop osl-cl dcw,t5dr'ta..rt wort.i or, Iota.4(YL Wasteload sent to EPA? (Major) Y (Y or N) (If yes, then attach updated evaluation of facility, including toxics spreadsheet, modeling analysis if modeled at renewal, and description of how it fits into basinwide plan) Additional Information attached? Y (Y or N) If yes, explain with attachments. - see above - P° wz ��, nWit) FibP°Scd 14" clown s4ie4,.,. Cit,4 Wk. 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: Muddy Creek WWTP NC00503452 74% Domestic, 26% Industrial Existing Renewal Yadkin River (A); Muddy Creek (B) WS-IV (A, B) 03-07-04 Forsyth Stream Characteristic: Winston-Salem USGS # FACT SHEET FOR WASTELOAD ALLOCATION Request # 7794g Date: Drainage Area (mi2): Summer 7Q10 (cfs): Winter 7Q10 (cfs): Average Flow (cfs): 30Q2 (cfs): IWC (%): Wasteload Allocation Summary 4h No'ft - 4. W L-As Lack - facility is requesting renewal of their permit _pop j p i p e S Y (r . L . WLA� - facility is currently meeting limits and instream monitoring shows no problems .k, - the second discharge to Muddy Creek (Pipe 002) is used as a backup when high water conditions in the Yadkin prevent discharge from Pipe 001. Discharge from Pipe 002 should be allowed only when flow at USGS gage 02116500 at Highway 64 on the Yadkin River near Yadkin College exceeds 5000 cfs - Betsy Johnson extended a QUAL2E model for the Archie Elledge WWTP to High Rock Lake to include this discharge, though little data was available for calibration. This model will be improved for the basin plan and some changes may be recommended when better data is available - reevaluated toxics according to new methods and discussed monitoring with Jeff Poupart in Pretreatment - some effluent monitoring requirements will be removed due to duplication in the pretreatment monitoring plan Greg Nizich 3/16/94 D17NE Special Schedule Requirements and additional comments from Reviewers:1 (o& f �� CtoCS Ge-S cf/x(r�t •'�'C "he* �,Cl T3 %f o IM ehruyh 7o f.'s, sit oq eldiy/cmyn4nce in 7`4,1s .r of Recommended by: Reviewed by ex Instream Assessment: Regional Supervisor: Permits & Engineering: 1144 a• 0211567980 (A) 0211590140 (B) 1/12/89(A); 1/10/89(B) 1967 (A); 186.5 (B) 554 (A); 55 (B) 854 (A); 74 (B) 1849 (A); 177 (B) 1115 (A); 95 (B) 4.0 (A); 30 (B) Date: _;__� s//a/ry Date: " 5' Date: ‘��/%f Date: RETURN TO TECHNICAL SUPPORT BY: 6 1994 2 S - ,moony 6267gK ' 1S MGM CONVENTIONAL PARAMETERS Monthly Average Summer Winter Wasteflow (MGD): 15 15 CBODS (mg/1): 25 25 NH3N (mg/1): monitor monitor DO (mg/1): monitor monitor TSS (mg/1): 30 30 Fecal Col. (/100 ml): 1000 1000 pH (SU): 6-9 6-9 Residual Chlorine (pg/1): monitor monitor Oil & Grease (mg/»: TP (mg/1): monitor monitor TN (mg/1): monitor monitor Existing Limits: Recommended Limits: Monthly Average Summer Winter WQ or EL Wasteflow (MGD): 15 15 CBODS (mg/1): 25 25 WQ NH3N (mg/1): monitor monitor DO (mg/1): monitor monitor TSS (mg/1): 30 30 EL Fecal Col. (/100 ml): 200 200 pH (SU): 6-9 6-9 EL Residual Chlorine (pg/1): monitor monitor Oil & Grease (mg/1): TP (mg/1): monitor monitor TN (mg/1): monitor monitor Limits Changes Due To: Change in 7Q10 data Change in stream classification Relocation of discharge Change in wasteflow Other (onsite toxicity study, interaction, etc.) Instream data New regulations/standards/procedures New facility information Parameter(s) Affected X fecal coliforms (explanation of any modifications to past modeling analysis including new flows, rates, field data, interacting discharges) (See page 4 for miscellaneous and special conditions, if applicable) 3 . - %9 vopy &EE K - M 9 Type of Toxicity Test: Existing Limit: Recommended Limit: Monitoring Schedule: Existing Limits TOXICS/METALS Monthly Limits Quarterly Limits COD (mg/): Cadmium (ug/1): monitor Chromium (ug/1): monitor Copper (ug/1): monitor Nickel (ug/1): monitor Lead (ug/l): Zinc (ug/l): monitor Cyanide (ug/1): Phenols (ug/1): Mercury (ug/1): Silver (ug/1): Recommended Limits monitor Monthly Limit Quarterly Limits WQ or EL COD (mg/): Cadmium (ug/1): Chromium (ug/l): Copper (ug/1): Nickel (ug/1): Lead (ug/1): vvt 0'1 Zinc (ug/l): monitor Cyanide (ug/l): Phenols (ug/1): Mercury (ug/1): Silver (ug/l): Limits Changes Due To: Change in 7Q10 data Change in stream classification Relocation of discharge Change in wasteflow New pretreatment and monitoring information Failing toxicity test Other (onsite toxicity study, interaction, etc.) WQ a 1?10 mom: Jr)l ital as discvSsed toi4 , pa t1C (2ov dr,'e L CdY15r5 tM, Parameter(s) Affected X Cd, Cr, Ni, Pb X 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 No parameters are water quality limited, but this discharge may affect future allocations. INSTREAM MONITORING REQUIREMENTS Upstream Location: Idols Dam Downstream Location: 4 49li 4o %n4L adf!-'S; 6 Li- SGC pPT pos i S. r ot'1 Parameters: DO, conductivity, CBOD5, NH3 as N, fecal coliform, temperature, lead a G,.ec/ 4o f o Special instream monitoring locations or monitoring frequencies: monitor lead quarterly, all other parameters weekly MISCELLANEOUS INFORMATION & SPECIAL CONDITIONS Adequacy of Existing Treatment Has the facility demonstrated the ability to meet the proposed new limits with existing treatment facilities? Yes No If no, which parameters cannot be met? Fr 4 L C vL i f o4 ,i MA Y N ar- Ge_ /46:r i47- 7NiS purf.4LL 6,94. Would a "phasing in" of the new limits be appropriate? Yes No 1" If yes, please provide a schedule (and basis for that schedule) with the regional office recommendations: If no, why not? (/J -S use.S ; iL 4o60_ 4o4)4 Ourh1i fa,e_ C'aL.cR/Att CCT 1—/i(4. THIS GJ/LL No7- et 4v4/LA64E SIp itI 42 • • Vt. v Li527-444en 1/{Pi¢c i At c4 i r 5 ©tcT/eALL. / G oiJL', TD u5L.0 ,4 tt, /A ij Z4(7-. 4414 FLOODi..✓6 o:,Jd/Tlpa)S2- Special Instructiions or Conditions l - P%t�t.SL Coo-tot/At-4 eri p oSG-a1 n54rtarrt. ritdY1-Ida/! loCa7 (AA. Wasteload sent to EPA? (Major) Y (Y or N) (If yes, then attach updated evaluation of facility, including toxics spreadsheet, modeling analysis if modeled at renewal, and description of how it fits into basinwide plan) Additional Information attached? Y (Y or N) If yes, explain with attachments. - see above 4Po, new rJrrposcd " Co lollSd7'la4►A• ✓jam ; 10Ca.4 />'l t. Facility Name A ODD y egg-Y %1 G1 TP Permit # NeooSo34SZ Pipe # 0Oy CHRONIC TOXICITY PERMIT LIMIT (QRTRLY) The effluent discharge shall at no time exhibit 48 hour acute toxicity as lethality in an effluent concentration of . % nor measure a quarterly arithmetic average chronic value less than this same percentage of waste. The chronic value will be determined using the geometric mean of the highest concentration having no statistically detectable impairment of reproduction or survival and the lowest concentration that does have a statistically detectable impairment of reproduction or survival. The presence of 48 hour acute toxicity will be determined using Fisher's Exact Test at 48 hours from test initiation. Collection methods, exposure regimes, and further statistical methods are defined in: The North Carolina Phase II Chronic Whole Effluent Toxicity Test Procedure (July, 1991) or subsequent versions. The permit holder shall perform at a minimum, quarterly monitoring using these procedures to establish compliance with the permit condition. The first test will be performed within thirty days from the effective date of this permit during the months of Jars 4 �►. J d D&.f. Effluent sampling for this testingshall be performed at the NPDES permitted final effluent discharge below all treatment processes. If the test procedure performed as the first test of any single quarter measures 48 hour acute toxicity or a chronic value less than that specified above, then multiple concentration testing shall be performed, at a minimum, in each of the two following months. All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge Monitoring Form (MR-1) for the months in which tests were performed, using the parameter code THP3B for the Chronic Value and TGA3B for the 48 hour Acute Toxicity measure (Pass/Fail). Additionally, DEM Form AT-3 (original) is to be sent to the following address: Attention: Environmental Sciences Branch North Carolina Division of Environmental Management 4401 Reedy Creek Road Raleigh, NC 27607 -Test data shall be complete and accurate and include all supporting chemical/physical measurements performed in association with the toxicity tests, as well as all dose/response data. Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for disinfection of the waste stream. Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Environmental Management indicate potential impacts to the receiving stream, this permit may be re- opened and modified to include alternate monitoring requirements or limits. NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism survival and appropriate environmental controls, shall constitute an invalid test and will require immediate retesting (within 30 days of initial monitoring event). Failure to submit suitable test results will constitute noncompliance with monitoring requirements. 7Q10 S.S4 cfs Permitted Flow IS MGD Recommended by: IWC 4 % Basin & Sub -basin 03 -0 7 - D'i �.� gibi Receiving Stream VAsici,v RI vkic County Fe& s yr, Date S/13114 QPIIL Version 7/91 r to 1 55' Log cca--ci zreva45 u-es,)-4914 780 000 FFFT . /"SC_ } Good -Hope Ch Facility: Muddy Creek WWTP - Pipe 00,e AMMONIA ANALYSIS: SUMMER 7Q10: NH3-N Effl. Conc: Standard (1 mg/I): Upstream NH3-N Conc.: Design Flow: Predicted NH3-N Instream: NH3-N Limit: WINTER 7Q10: NH3-N Effl. Conc: Standard (1.8 mg/I): Upstream NH3-N Conc.: Design Flow: Predicted NH3-N Instream: NH3-N Limit: 554 cfs 15.00 mg/I 1000 ug/I 220 ug/I 15.00 MGD 815 ug/I 0.82 mg/I 19586 ug/I 19.59 mg/I 854.00 cfs 15.00 mg/I 1800 ug/I 220 ug/I 15.00 MGD 612 ug/I 0.6117 mg/I 59835 ug/I 59.835 mg/I CHLORINE ANALYSIS: 7Q10: 554 cfs cfs Effluent Concentration: 1.00 mg/I mg/I Instream Standard: 17 ug/I ug/I Upstream Chlorine Conc.: 0.00 ug/I ug/I Design Flow: 15.00 MGD MGD Predicted NH3-N Instream: 40 ug/I ug/I 0.04 mg/I mg/I LIMIT: 422.08 ug/I ug/I 0.422 mg/I mg/I Facility: Muddy Creek WWTP - Pipe OK OOZ �7 94 5 AMMONIA ANALYSIS: SUMMER 7010: NH3-N Effl. Conc: Standard (1 mg/I): Upstream NH3-N Conc.: Design Flow: Predicted NH3-N Instream: NH3-N Limit: WINTER 7010: NH3-N Effl. Conc: Standard (1.8 mg/I): Upstream NH3-N Conc.: Design Flow: Predicted NH3-N Instream: NH3-N Limit: 55 cfs 15.00 mg/I 1000 ug/I 220 ug/I 15.00 MGD 4612 ug/I 4.61 mg/I 2845.2 ug/I 2.85 mg/1 74.00 cfs 15.00 mg/I 1800 ug/I 220 ug/I 15.00 MGD 3754 ug/I 3.7535 mg/I 6828.8 ug/I 6.8288 mg/I CHLORINE ANALYSIS: 7010: Effluent Concentration: Instream Standard: Upstream Chlorine Conc.: Design Flow: Predicted NH3-N Instream: LIMIT: 55 cfs cfs 1.00 mg/I mg/I 17 ug/I ug/I 0.00 ug/I ug/I 15.00 MGD MGD 297 ug/I ug/I 0.30 mg/I mg/I 57.22 ug/I ug/I 0.057 mg/I mg/l TOXICANT ANALYSIS /4 Facility Name Muddy Creek WWTP NPDES # NC0050342 Ow (MGD) 15 7Q 10s (cfs) , 554 IWC (%) 4.03. Rec'ving Stream Yadkin River WS-IV Stream Class FINAL RESULTS Cr Max. Pred Cw 4.8 Allowable Cw 1241.4 Cu - Max. Pred Cw 37.4 Allowable Cw 173.8 Ni Max. Pred Cw 33.6 Allowable Cw 620.7 Zn Max. Pred Cw 3825 Allowable Cw 1241.4 Pb Max. Pred Cw 14.4 Allowable Cw 620.7 Cd Max. Pred Cw 0 Allowable Cw 49.7 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 0 Max. Pred Cw 0 Allowable Cw 0.0 0 5/4/94 PAGE 1 TOXICANT ANALYSIS Facility Name Muddy Creek WWTP NPDES # NC0050342 Qw (MGD) 151 7Q10s (cfs) 29.71 551 !WC(%) Reeving Stream Muddy Creek Stream Class WS-IV ' FINAL RESULTS Cr Max. Pred Cw 4.8i ug/I Allowable Cw 168.3 1 ug/I i I Cu I Max. Pred Cw 37.41ug/1 Allowable Cw 23.61ug/I I Ni Max. Pred Cw 33.61ug/I Allowable Cw 84.1 ug/1 1 Zn I I Max. Pred Cw 3825ug/1 Allowable Cw 168.3 i ug/I Pb 'I Max. Pred Cw 14.41ug/I Allowable Cw 84.1; ug/1 Cd a Max. Pred Cw 0 ug/I Allowable Cw 6.7l ug/I 5/4/94 PAGE DRAFT REOUEST°` WASTEL°A° PERMIT NO.: NC0050342 PERNIITTEE NAME: FACILITY NAME: Winston-Salem Forsyth County Utility Muddy Creek WWTP Facility Status: Existing Permit Status: Renewal with Modification Major -Nl Minor Pipe No.: 001 Design Capacity: 21.0 MGD* Domestic (% of Flow): 74 % Industrial (% of Flow): 26 % Comments: * Increase from 15 MGD. EA is currently under review. -s RECEIVING STREAM: Yadkin River (001) and Muddy Creek (002) Class: WS HI mete 1 L &YD i Sub -Basin: 03-07-04 �1 Reference USGS Quad: D17NE County: Forsyth Regional Office: Winston-Salem Regional Office Previous Exp. Date: 8/31/94 Treatment Plant Class: IV Classification changes within three miles: VVS-L Requested by: Greg Nizich6 50 -Os vet cz (please attach) Date: 3/16/94 Prepared by: 7 T , ��f t Date: (o'/ 3 /9# Reviewed by: /�.?' • Date: ‘//-3 `l y -tIA3D(s) / r! (L) ( 3 q Modeler kle• Date Rec. # fit-v.14A 3\ VA\ 4i4 1 i i 5-- Drainage Area (mil ) Avg. Streamflow (cfs): 77 7Q10 (cfs))t; �/ f�{ Winter 7Q10 (cfs)30Q2 (cfs) /Iq5s- Toxicity Limits: IWC 5 $/ — % Accute(Chro) Instream Monitoring: - J yin) K rN R . d;scha c ` J Parameters DI, nevi cl . r C R 0 D 5 , N F{3 -1Q 1 1'e r.o-/ cn l4rrti , , Location !cloIc Dar Pb Location R. 3 ,it l .b»cw d ;s ci t, (a. �� .n�. b to / in , Upstream '1 Downstream Y Effluent Characteristics A 5 0 t S GJ C=' °t/s (mg/1) ZS ZS ZS ZS NH3-N (mg/1) 1 q ncenn;1r 1li ►a...an;Ior D.O. (mg/1) . S S 5- TSS (mg/1) 30 _3n 36 3 0 F. Col. (/100 ml) ZOO Zoo ,0() Z.' PH (SU) % - ! to - ! 6 `, 6 - `j Tp(,.„.1). j,e) mArtilor 44.474; ),- ,z,en; 1-or i► ice IN ( ) ium; d.or .Kest 4z4)r rKo)u.)loi *um;,4i) rum; It r1„,,J or RI) (.t) "mom; lot tu-a tJ kr P344 ti-ot ri'imi; -for 2'/i (k crU g) Mardi°r Y 44;ioc. \ es. ChLr;,u1 ilJ Z8 08 Z8 ZY Comments: Tke 1;44 ;4 t f' ;/ f ,1I/44.�.�.s r he f vwox,{�i r ir..xa a�q.� . Far ; /; 4 will p /taa.c ram., -FR r' 7 cars . 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: FACT SHEET FOR WASTELOAD ALLOCATION Muddy Creek WWTP NC00503452 74% Domestic, 26% Industrial Existing Renewal w/modification Yadkin River (A); Muddy Creek (B) WS-IV (A, B) 03-07-04 Forsyth Winston-Salem Greg Nizich 3/16/94 D17NE Request # r• _JECE.gED 7795A N''? . Dept. of El-LNF MAY 2 ? 4g9i1 Regional Utfice Stream Characteristic: USGS # Date: Drainage Area (mi2): Summer7Q10 (cfs): Winter 7Q10 (cfs): Average Flow (cfs): 0211567980 (A) 0211590140 (B) 1/12/89(A); 1/10/89(B) 1967 (A); 186.5 (B) 554 (A); 55 (B) 854 (A); 74 (B) 1849 (A); 177 (B) 30Q2 (cfs): 1115 (A); 95 (B) r Z IWC (%): 5.5 (A); 37 (B) Wasteload Allocation Summary i- t t IQe' Z Wks .fo pipes e (i.e. xi!S> iJLAs (obi, 0 - facility is requesting an increase in flow from 15 MGD to 21 MGD - facility is currently meeting limits and instream monitoring shows no problems - the second discharge to Muddy Creek (Pipe 002) is used as a backup when high water conditions in the Yadkin prevent discharge from Pipe 001. Discharge from Pipe 002 should be allowed only when flow at USGS gage 02116500 at Highway 64 on the Yadkin River near Yadkin College exceeds 5000 cfs - Betsy Johnson extended a QUAL2E model for the Archie Elledge WWTP to High Rock Lake to include this increased discharge, though little data was available for calibration. Current CBOD5 limits appear sufficient. This model will be improved for the basin plan and some changes may be recommended when better data is available - reevaluated toxics according to new methods and discussed monitoring with Jeff Poupart in Pretreatment - some effluent monitoring requirements will be removed due to duplication in the pretreatment monitoring plan Special Schedule Requirements and additional comments from Reviewers: P C—boa -417- „,J Recommended by: /.P�p , d Date: 551IZ Reviewed by Instream Assessment: Date: rhan'Y p Regional Supervisor: - Z -t-t _ � � __ Date: 6,—,Z - 2 Permits & Engineering: / )z� �j»��ilfGy! i Date: RETURN TO TECHNICAL SUPPORT BY: /D 91 2A- VADKIN ki L/ - 71 MGQ CONVENTIONAL PARAMETERS F,xisting Limits: Monthly Average Summer Winter Wasteflow (MGD): 15 15 CBOD5 (mg/1): 25 25 NH3N (mg/I): monitor monitor DO (mg/1): monitor monitor TSS (mg/1): 30 30 Fecal Col. (/100 ml): 1000 1000 pH (SU): 6-9 6-9 Residual Chlorine (pg/1): monitor monitor Oil & Grease (mg/1): TP (mg/1): monitor monitor TN (mg/1): monitor monitor Recommended Limits: Monthly Average Daily Max. Summer Winter Summer Winter WQ or EL Wasteflow (MGD): 21 21 CBOD5 (mg/1): 25 25 WQ NH3N (mg/1): 14 monitor WQ DO (mg/1): 5 5 WQ TSS (mg/1): 30 30 EL Fecal Col. (/100 ml): 200 200 pH (SU): 6-9 6-9 EL Residual Chlorine (pg/1): 28 28 WQ Oil & Grease (mg/1): TP (mg/1): monitor monitor TN (mg/I): monitor monitor Limits Changes Due To: Change in 7Q10 data Change in stream classification Relocation of discharge Change in wasteflow Other (onsite toxicity study, interaction, etc.) Instream data New regulations/standards/procedures New facility information Parameterls) Affected X NH3, residual chlorine X fecal coliforms (explanation of any modifications to past modeling analysis including new flows, rates, field data, interacting discharges) (See page 4 for miscellaneous and special conditions, if applicable) 3A - yApK,QlvR - Z1 Map TOXICS/METALS Type of Toxicity Test Chronic toxicity (Cerodaphnia) ChV; Pollutant Analysis Existing Limit 4% Recommended Limit 5.5% Monitoring Schedule: Jan, Apr, Jul, Oct; annually Existing Limits COD (mg/): Cadmium (ug/1): Chromium (ug/1): Copper (ug/1): Nickel (ug/1): Lead (ug/1): Zinc (ug/1): Cyanide (ug/1): Phenols (ug/1): Mercury (ug/1): Silver (ug/1): Recommended Limits Monthly Limit Quarterly Limit monitor Monthly Limit Quarterly Limit WQ or EL COD (mg/): Cadmium (ug/1): Chromium (ug/1): Copper (ug/1): Nickel (ug/1): Lead (ug/): MotAkko ✓ Zinc (ug/1): monitor WQ Cyanide (ug/1): Phenols.(ug/1): Mercury (ug/1): Silver (ug/1): Limits Changes Due To; Jarameter(s) Affected Change in 7Q10 data Change in stream classification Relocation of discharge Change in wasteflow New pretreatment and effluent monitoring information X Cd, Cr, Cu, Ni, Pb Failing toxicity test Other (onsite toxicity study, interaction, etc.) 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 No parameters are water quality limited, but this discharge may affect future allocations. Lt&tL nie-cu.+rJ FccovKn�nc4lC vw WAc PPnES inu Aft. lugia Co.i-55) in5haarn 4 - 2! /1161:7 INSTREAM MONITORING REQUIREMENTS Upstream Location: Idols Dam '��i -5t� Downstream Location: US-Highwa' Vo r I 1s no 1 °n4tAso .loess , Parameters: DO, conductivity, CBOD5, NH3 as N, fecal coliform, temperature, lead Special instream monitoring locations or monitoring frequencies: monitor lead quarterly, all other parameters weekly MISCELLANEOUS INFORMATION & SPECIAL CONDITIONS Adequacy of Existing Treatment pro IDostd S!�( 4900 Has the facility demonstrated the ability to meet the proposed new limits with existing treatment facilities? Yes No 1% If no, which parameters cannot be met? r e N o dR TA Would a "phasing in" of the new limits be appropriate? Yes ✓No jeAf6444.vT ,e 0 If yes, please provide a schedule (and basis for that schedule) with the regional office recommendations: c D N J c,eS ATi o 0/ T,J r n! 5-7' Al OL1546 1 .' A re ,O �6vu.T /7 VA4ts_'s 'TO OLD f/./ €eV/i-LS A..,0 641- .ni4?7on% I%/..r' 2 :Ai 445e'AA6E_ /5 / firro 7AeborfAr de, tit o,, 7W1S OJF/cE 4+Es Alb; , r TO /` Sep Car-{ H to i-5 6,4 77 94- ,4 o fu, 2,ed A/6 4ow,4a'7-4eA.-f nom r-r-oX fA.16 LocArran.. ActV z LJC, -70•1 NrlA fI7P44H41 • & -Z-94- If no, why not? Special Instructions or Conditions do km s kita.r'C VV( Regional staff - please comment on a schedule for the facility to meet the new chlorine limits' 4k4:1 rh ani,107';Ay Wasteload sent to EPA? (Major) Y (Y or N) (If yes, then attach updated evaluation of facility, including toxics spreadsheet, modeling analysis if modeled at renewal, and description of how it fits into basinwide plan) Additional Information attached? Y (Y or N) If yes, explain with attachments. - see above • -iopo "nap w L hLk/ ?ropostol rterti-florin )oCa,-east (c1010/1.54Y-la*K.) IoC.414171., 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: FACT SHEET FOR WASTELOAD ALLOCATION Muddy Creek WWTP NC00503452 74% Domestic, 26% Industrial Existing Renewal w/modification Yadkin River (A); Muddy Creek (B) WS-IV (A, B) 03-07-04 Forsyth Winston-Salem Request # 7795g Stream Characteristic: USGS # Date: Drainage Area (mi2): Summer 7Q10 (cfs): Winter 7Q10 (cfs): Average Flow (cfs): 30Q2 (cfs): z IWC (%): Wasteload Allocation Summary 4( jo f. ' Z 0 s t pipts Gaek - facility is requesting an increase in flow from 15 MGD to 21 MGD - facility is currently meeting limits and instream monitoring shows no problems - the second discharge to Muddy Creek (Pipe 002) is used as a backup when high water conditions in the Yadkin prevent discharge from Pipe 001. Discharge from Pipe 002 should be allowed only when flow at USGS gage 02116500 at Highway 64 on the Yadkin River near Yadkin College exceeds 5000 cfs - Betsy Johnson extended a QUAL2E model for the Archie Elledge WWTP to High Rock Lake to include this increased discharge, though little data was available for calibration. Current CBOD5 limits appear sufficient. This model will be improved for the basin plan and some changes may be recommended when better data is available - reevaluated toxics according to new methods and discussed monitoring with Jeff Poupart in Pretreatment - some effluent monitoring requirements will be removed due to duplication in the pretreatment monitoring plan Greg Nizich 3/16/94 D17NE Special Schedule Requirements and additional comments from Reviewers: 41.4- .4 'mete Al • ' ,PA P L E c 7-- %.S- 04164 tit tioT a.! r-tG4 7 Set ©7.4e.0 C%�r•{/i [.v 7-S 0 7 79$'A 5Gc c. r. 'z : Pb al? 77916. /4/5o11,a4z Aelpme4 %$f cc►,Fazea fr' i r, cOichale, " py Recommended by: Reviewed by a Instream Assessment: 0211567980 (A) 0211590140 (B) 1/12/89(A); 1/10/89(B) 1967 (A); 186.5 (B) 554 (A); 55 (B) 854 (A); 74 (B) 1849 (A); 177 (B) 1115 (A); 95 (B) 5.5 (A); 37 (B) e . hi 16>a WLg s -104. 0 d .. Date:.51 Regional Supervisor: Permits & Engineering: 7 Date: ,/ /a/ ! i Date: 6 -2. - 3 5/ Date: A .r,� RETURN TO TECHNICAL SUPPORT BY: Existing Limits: Wasteflow (MGD): CBOD5 (mg/1): NH3N (mg/1): DO (mg/1): TSS (mg/1): Fecal Col. (/100 ml): pH (SU): Residual Chlorine (pg/1): Oil & Grease (mg/1): TP (mg/1): TN (mg/1): Recommended Limits: Wasteflow (MGD): CBOD5 (mg/I): NH3N (mg/1): DO (mg/1): TSS (mg/1): Fecal Col. (/100 ml): pH (SU): Residual Chlorine (pg/1): Oil & Grease (mg/1): TP (mg/1): TN (mg/1): Summer IS 21 25 J� +e14iter- 5 30 200 6-9 2$ /tfupvy CWK - 2141617 CONVENTIONAL PARAMETERS Monthly Average Summer Winter 21 11 21 25 25 monitor monitor monitor monitor 30 30 1000 1000 6-9 6-9 monitor monitor monitor monitor monitor monitor Monthly Average Winter h 21 25 monitor 5 30 200 6-9 monitor monitor monitor monitor Limits Changes Due To: Change in 7Q10 data Change in stream classification Relocation of discharge Change in wasteflow Other (onsite toxicity study, interaction, etc.) Instream data New regulations/standards/procedures New facility information Daily Maximum Summer Winter 28 28 ill B WQ or EL WQ ! IJ EL - e,a4y.tM. - WQ EL F h;finur�� ,t1udt 6144 011 dALJSSu»-' Wf Yak oedJ1;c1A. J 5j & cli5- CloAy_ ; a4 Sfin,05, txt /14 yocl aatU.k - EL WQ Parameter(s) Affected VA LA ya S k, 2• of anymodifications to past modelinganalysis includingnew flows, rates, field data, interacting (explanation P Y g I discharges) `t 5 X residual chlorine X fecal coliforms (See page 4 for miscellaneous and special conditions, if applicable) 3 B - M vp o f d. EE'g - 21 MCP Type of Toxicity Test Existing Limit: Recommended Limit: Monitoring Schedule: Existing Limits TOXICS/METALS Monthly Limits Quarterly Limits COD (mg/): Cadmium (ug/1): monitor Chromium (ug/1): monitor Copper (ug/1): monitor Nickel (ug/1): monitor Lead (ug/1): Zinc (ug/l): monitor Cyanide (ug/1): Phenols (ug/1): Mercury (ug/1): Silver (ug/l): Recommended Limits monitor Monthly Limit Quarterly Limits WQ or EL COD (mg/): Cadmium (ug/1): Chromium (ug/1): Copper (ug/1): Nickel (ug/1): Lead (ug/1): t'►. i+o Zinc (ug/1): monitor WQ Cyanide (ug/1): Phenols (ug/1): Mercury (ug/1): Silver (ug/1): Limits Changes Due To: Parameter(s) Affected Change in 7Q10 data Change in stream classification Relocation of discharge Change in wasteflow New pretreatment and effluent monitoring information X Cd, Cr, Cu, Ni, Pb Failing toxicity test Other (onsite toxicity study, interaction, etc.) -see eiz4, cal 7714 3 X 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 No parameters are water quality limited, but this discharge may affect future allocations. Upstream Location: Downstream Location: Parameters: INSTREAM MONITORING REQUIREMENTS Idols Dam �1 �j� - stc !0L is no Ianq ea&, MCISSi DO, conductivity, CBOD5, NH3 as N, fecal coliform, temperature, lead Special instream monitoring locations or monitoring frequencies: monitor lead quarterly, all other parameters weekly MISCELLANEOUS INFORMATION & SPECIAL CONDITIONS Adequacy of Existing Treatment pro oScd s / ort a 4c t-o( 49ec Has the facility demonstrated the ability to meet the proposed new limits with existing treatment facilities? Yes No L7.- If no, which parameters cannot be met? T/CG 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 cloy km 3 411.4/,,•L � i/t /oca�oh ,l Regional staff - please comment on a schedule for the facility to meet the new chlorine limits Mid Manir' Wasteload sent to EPA? (Major) Y (Y or N) J (If yes, then attach updated evaluation of facility, including toxics spreadsheet, modeling analysis if modeled at renewal, and description of how it fits into basinwide plan) Additional Information attached? Y (Y or N) If yes, explain with attachments. - see above _ -lopo co hc-w pro poS lit4>ti f�l in I0Ca,ham-. P-01011. -i 'tank.) (QI,r Facility Name MOPDy U l)T P Permit # KC o o e)3 C/ j Pipe # OD! CHRONIC TOXICITY PERMIT LIMIT (QRTRLY) The effluent discharge shall at no time exhibit 48 hour acute toxicity as lethality in an effluent concentration ofK650 nor measure a quarterly arithmetic average chronic value less than this same percentage of waste. The chronic value will be determined using the geometric mean of the highest concentration having no statistically detectable impairment of reproduction or survival and the lowest concentration that does have a statistically detectable impairment of reproduction or survival. The presence of 48 hour acute toxicity will be determined using Fisher's Exact Test at 48 hours from test initiation. Collection methods, exposure regimes, and further statistical methods are defined in: The North Carolina Phase IL Chronic Whole Effluent Toxicity Test Pr9cedure (July, 1991) or subsequent versions. The permit holder shall perform at a minimum, quarterly monitoring using these procedures to establish compliance with the permit condition. The first test will be performed within thirty days from the effective date of this permit during the months of Jai, Ape. Jd 1, bd-. Effluent sampling for this testing shall be performed at the NPDES permitted final effluent discharge below all treatment processes. If the test procedure performed as the first test of any single quarter measures 48 hour acute toxicity or a chronic value less than that specified above, then multiple concentration testing shall be performed, at a minimum, in each of the two following months. All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge Monitoring Form (MR-1) for the months in which tests were performed, using the parameter code THP3B for the Chronic Value and TGA3B for the 48 hour Acute Toxicity measure (Pass/Fail). Additionally, DEM Form AT-3 (original) is to be sent to the following address: Attention: Environmental Sciences Branch North Carolina Division of Environmental Management 4401 Reedy Creek Road Raleigh, NC 27607 -Test data shall be complete and accurate and include all supporting chemical/physical measurements performed in association with the toxicity tests, as well as all dose/response data. Total residual chlorine of the effluent toxicity sample must be measured and reported if chlorine is employed for disinfection of the waste stream. Should any test data from this monitoring requirement or tests performed by the North Carolina Division of Environmental Management indicate potential impacts to the receiving stream, this permit may be re- opened and modified to include alternate monitoring requirements or limits. NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control organism survival and appropriate environmental controls, shall constitute an invalid test and will require immediate retesting (within 30 days of initial monitoring event). Failure to submit suitable test results will constitute noncompliance with monitoring requirements. 7Q10 5'0 cfs Permitted Flow 2 ! MGD 1WC % Basin & Sub -basin 03 - p 7 • D'� Receiving Stream YApr(iru olti? County I( syrq QPIIL Version 7191 Recommended by: 7:p3 �•� Date Slr31N V76 3975 55' gyea..1-ti I. • 4rEvE.os Aftckue90,74 Pve s.e,d iJor. san -! • 780 000 pcm• 0 ut CHURCHLAND QUADRANGLE ��G ,0 NORTH CAROLINA pAh�O 7.5 MINUTE SERIES (TOPOGRAPHIC) 25' 553 554 1555 1 590 000 FEET PROPOSED DOWNSTREAM SAMPLING LOCATION MUDDY CREEK WWTP -9.3 MILES BELOW DISCHARGE POINT `0.26 MILES BELOW HWY 64 BRIDGE (previous downstream sampling point) A 80°22'30" a.vi.To ri.c.,so _35°52'30" 3970 69 770 000 FEET cV� y= Op O~ ap z OW 0 i7 3966 50' 3965 TOXICANT ANALYSIS Facility Name Muddy Creek WWTP NPDES # NC0050342 i 21 Qw (MGD) 7Q 10s (cfs) 554 /WC (%) 5.55 Rec'ving Stream Yadkin River i Stream Class WS-IV FINAL RESULTS Cr i Max. Pred Cw 4.8iug/I Allowable Cw 901.0 ug/I Cu Max. Pred Cw 37.4; uig/I Allowable Cw 126.11 ug/1 Ni i Max. Pred Cw 33.6 ug/I Allowable Cw 450.51 ug/l i Zn ' i Max. Pred Cw 3825 ug/I Allowable Cw 901.0; ug/I Pb i Max. Pred Cw 14.4 ug/I Allowable Cw 450.5 ug/I i Cd Max. Pred.Cw 0ug/I Allowable Cw 36.0ug/I '5/4/94 PAGE TOXICANT ANALYSIS Facility Name Muddy Creek WWTP NPDES # NC0050342 I Qw (MGD) 21 7Q 10s (cfs) 551 !WC (%) 37.181 Reeving Stream Muddy Creek Stream Class WS-IV I L FINAL RESULTS Cr Max. Pred Cw 4.8'ug/I Allowable Cw 134.5 ug/l Cu I Max. Pred Cw 37.4; g l/I/ Allowable Cw 18.8lug/l 1 Ni Max. Pred Cw 33.6lug/I Allowable Cw 67.21 ug/I Zn 1 Max. Pred Cw 38251 ug/I Allowable Cw 134.5 ug/I Pb i Max. Pred Cw 14.4 ug/I Allowable Cw 67.21 ug/i Cd Max. Pred Cw 0 ug/1 Allowable Cw 5.4ug/1 PAGE Facility: Muddy Creek WWTP - Pipe 001 AMMONIA ANALYSIS: SUMMER 7010: NH3-N Effl. Conc: Standard (1 mg/I): Upstream NH3-N Conc.: Design Flow: Predicted NH3-N Instream: NH3-N Limit: WINTER 7Q10: NH3-N Effl. Conc: Standard (1.8 mg/I): Upstream NH3-N Conc.: Design Flow: Predicted NH3-N Instream: NH3-N Limit: 554 cfs 15.00 mg/I 1000 ug/I 220 ug/I 21.00 MGD 1040 ug/I 1.04 mg/I 14276 ug/I 14.28 mg/I 854.00 cfs 15.00 mg/I 1800 ug/I 220 ug/I 21.00 MGD 763 ug/I 0.7627 mg/I 43254 ug/I 43.254 mg/I 4.0.01.41 #g1-9SA CHLORINE ANALYSIS: 7010: Effluent Concentration: Instream Standard: Upstream Chlorine Conc.: Design Flow: Predicted NH3-N Instream: 554 cfs cfs 1.00 mg/I mg/I 17 ug/I ug/I 0.00 ug/I ug/I 21.00 MGD MGD 55 ug/I ug/I 0.06 mg/I mg/I LIMIT: 306.34 ug/I ug/I 0.306 mg/I mg/I Facility: Muddy Creek WWTP - Pipe 002 AMMONIA ANALYSIS: SUMMER 7Q10: NH3-N Effl. Conc: Standard (1 mg/I): Upstream NH3-N Conc.: Design Flow: Predicted NH3-N Instream: NH3-N Limit: WINTER 7Q10: NH3-N Effl. Conc: Standard (1.8 mg/I): Upstream NH3-N Conc.: Design Flow: Predicted NH3-N Instream: NH3-N Limit: 55 cfs 15,00 mg/I 1000 ug/I 220 ug/I 21.00 MGD 5715 ug/I 5.72 mg/I 2318 ug/I 2.32 mg/I 74.00 cfs 15.00 mg/I 1800 ug/I 220 ug/I 21.00 MGD 4735 ug/I 4.7351 mg/I 5392 ug/I 5.392 mg/I CHLORINE ANALYSIS: 7Q10: 55 cfs cfs Effluent Concentration: 1.00 mg/I mg/i Instream Standard: 17 ug/I ug/I Upstream Chlorine Conc.: 0.00 ug/I ug/I Design Flow: 21.00 MGD MGD Predicted NH3-N Instream: 372 ug/I ug/I 0.37 mg/I mg/I LIMIT: 45.73 ug/I ug/I 0.046 mg/I mg/l TOXICANT ANALYSIS tl Facility Name Muddy Creek WWTP NPDES # NC0050342 21i i Qw(MGD) 7Qi0s (cfs) 554! 5.551 /WC (%) Rec'ving Stream Yadkin River Stream Class WS-IV ' FINAL RESULTS Cr i i Max. Pred Cw 4.8iug/I Allowable Cw 901.0 ug/I Cu Max. Pred Cw 37.4 ug/I Allowable Cw 126.1 l ug/I I Ni Max. Pred Cw 33.6 ug/I Allowable Cw 450.5 ug/I Zn i Max. Pred Cw 3825ug/I Allowable Cw 901.0i ug/I I Pb i Max. Pred Cw 14.4!ug/I Allowable Cw 450.5 ug/I i Cd i Max. Pred Cw 0 ug/l Allowable Cw 36.09 ug/I 5/4/94 PAGE TOXICANT ANALYSIS Is Facility Name Mud y Creek WWTP NPDES # NC0050342 i Qw (MGD) 21 7Q10s (cfs) 551 !WC (%) 37.18 Reeving Stream Muddy Creek Stream Class WS-IV '. FINAL RESULTS Cr i I Max. Pred Cw 4.8 1 ug/l Allowable Cw 134.5I ug/I Cu 1 Max. Pred Cw 37.4 ug/I Allowable Cw 18.8I ug/1 1 Ni I Max. Pred Cw 33.6I ug/1 Allowable Cw 67.2l ug/l 1 i Zn I Max. Pred Cw 38251 ug/I Allowable Cw 134.5 ug/l 1 Pb i Max. Pred Cw 14.41 ug/I Allowable Cw 67.2 ug/I Cd i Max. Pred Cw 4l ug/1 Allowable Cw 5.41 ug/i 5/4/94 PAGE ' �jA State of North Carolina Department of Environment, Health and Natural Resources Division of Environmental Management James B. Hunt, Jr., Governor Jonathan B. Howes, Secretary A. Preston Howard, Jr., P.E., Director March 29, 1994 MEMORANDUM TO: FROM: Monica Swihart;°/ Water Quality Planning SUBJECT: EA - City of Winston-Salem Muddy Creek Wastewater Treatment Plant Expansion Melba McGee, Policy Development Enclosed are ten copies of the subject Environmental Assessment for EHNR review. Please circulate the documents to the appropriate agencies and provide me with any comments and follow-up guidance. Thank you for your assistance. Please let me know if you have any questions or need additional copies. Muddycrea.mem cc: Coleen Sullins Ruth Swanek Steve Mauney �74R 2 r•i:.. 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 i TO: FROM: CITY OF WINSTONSALEM PUBLIC WORKS DEPARTMENT P.O. BOX 2311. WINSTON-SALEM, NORTH CAROLINA 27102 ATTACHMENT Environmental Assessment for Muddy Creek Wastewater Treatment Plant Uprating Stanley B. Webb Plant Manager - Muddy Creek WWTP DATE: March 11, 1994 SUBJECT: E. A. for Proposed Uprating of Muddy Creek WWTP City of Winston-Salem NPDES Permit Number NC0050342 Indirect Impact on 7010 Flow in Yadkin River DEM's water quality section (WQS) has reviewed this assessment and expressed a concern that future development indirectly result- ing from this plant uprating may result in a decrease in the 7Q10 flow of the Yadkin River. The WQS has questioned whether the City of Winston-Salem will take steps to mitigate the impact by main- taining- the 7Q10 flow. The City has been asked to address this issue by other State divi- sions following their review of an EA for the construction of a raw water intake. the City proposes to locate on the Yadkin River. These divisions have asked Winston-Salem to release water from the Kerr Scott Reservoir to maintain a 7Q10 of 554 CFS at the point where our wastewater discharges enter the river. The City has some concerns with this request; the first being that 7Q10 conditions do not constantly exist in the river since this value represents a seven day average flow. Another concern involves the logistics of trying to maintain a 7Q10 flow at a point greater than 50 miles downstream of the water release site. We feel that in order to overcome these logistical constraints, the City would have to release an excessive amount of water during drought periods to provide an acceptable margin of safety. The City and the Corps of Engineers are hesitant to un- necessarily increase the release of water from the reservoir under such conditions because of the potential to adversely impact a public water supply. Attachment March 11, 1994 Page 2 Winston-Salem is willing to take steps to maintain the status quo flow in the river during drought conditions. We cannot guarantee, however, that the 7Q10 flow will be continuously maintained on a daily basis. The City is willing to increase the minimum release rate from Kerr Scott by the amount of water withdrawn by the proposed water in- take. By increasing the minimum release rate of 125 CFS, which is based on 7Q10 flow, by the daily average flow withdrawn from the river, the minimum flow level in the river should remain at the status quo. The Corps of Engineers has reviewed this proposal and they feel it is acceptable in that it•provides flow augmentation for the river and it protects Wilkes County's interest in the Kerr Scott Reser- voir. It DIVISION OF ENVIRONMENTAL MANAGEMENT February 18, 1994 MEMORANDUM TO: Monic THROUGH: Do FROM: Ruth Swanek t2cS SUBJECT: Winston-Salem Muddy Creek WWTP Expansion EA NPDES No. NC0050342 Yadkin River (030704) I have reviewed the City of.Winston-Salem's environmental assessment (EA) for the proposed expansion of its Muddy Creek WWTP from 15 MGD to 21 MGD and offer the following comments: 1. The document states that existing permit limits are assumed for the expanded flow. Preliminary modeling indicates that the existing CBOD5 and NH3 limits will protect the dissolved oxygen standard, but a more stringent summer NH3 limit (14 mg/1) is needed to protect the stream from toxic effects. The report also correctly states that DEM will be developing a calibrated QUAL2E model of the Yadkin River below the Muddy Creek WWTP as part of the Yadkin basin planning process. If the model indicates that the river has been overallocated, more stringent limits may be .applied to the Muddy Creek WWTP. 2. The EA correctly states that the Division is concerned about nutrient loading to High Rock Lake. Upon completion of the High Rock Lake nutrient modeling effort, nutrient controls may be placed in some NPDES permits in the basin. The report further indicates that developed land in the EA study area will increase from 48% to 83% while forested area will decrease from 39% to 11%. This change in land use is likely to increase nutrient loading to High Rock Lake. 3. The report indicates that the 7Q10 at the discharge point is 600 cfs. Our files indicate that the 7Q10 is 554 cfs. The report further describes the water withdrawals the City has in Salem Lake and the Yadkin River. As withdrawals increase as a result of growth in the area, will the 7Q10 be maintained downstream? If you have any questions, please call me at extension 503. Toxics Spreadsheet Facility Name NPDES # Qw (MGD) 7Q10s (cfs) IWC (%) Rec'ving Stream Stream Class Expanded Qw IWC Winston-Salem 50342 15 554 4.03 Yadkin River wS-III 21 5.55 Chromium Copper Nickel Ztnc 90 92 77 53 75 48 44 43 58 53 41 43 101 41 750 56 46 44 34 31 39 40 60 67 1 2 3 2 2 1 2 3 2 2 2 1 1 1 2 2 3 2 2 2 2 3 3 4 9 10 12 7 9 7 8 10 22 15 9 6 10 7 10 9 11 12 6 5 4 4 10 10 12 12 11 13 10 10 10 12 17 21 13 11 12 14 19 7 10 10 13 8 7 6 8 8 Lead Cadmium 9 3 9 2.5 9 2 7 1.5 8 2 7 2 9 2.5 9 2 9 7 12 8 9 10 9 8 7 8 7 6 7 7 7 7 3 2 3 2.5 2.5 3 2 1.5 1.5 2.5 2 1.5 2 2 1.8 2 max 4 22 21 750 12 3 standard 50 7 _ 25 50 25 2 std dev 0.76 3.70 3.59 140.03 1.30 0.48 mean 2.08 9.25 11.42 84.42 8.13 2.18 cv 0.36 0.40 0.31 1.66 0.16 0.22 mutt. fact. 1.6 1.7 1.5 5 1.2 1.3 Max. Pred. 6.4 37.4 31.5 3750 14.4 3.9 Allowable (15 mgd; 1241.4 173.8 620.7 1241.4 620.7 49.7 Allowable (21 mgd', 901.0 126.1 _ 450.5 , 901.0 450.5 36.0 DMR data only rivw &aL -cam- Ck ,t:12sC) by 13 D Q 7.3 3 3, zed o, z 57(16, 5cT '� i. 5 .6-1 406c,PA. 1 a 32� . 7C, 9. << 6. v5 4'77 Cy wl S(fl$ �.34 1 Jc- 0, 32 ✓h1, AJO z �3 0,J-7 0 1, vy7 ,o/ 6-41 @ v_ 32. s - CP,_0 1ac) v 1• 07 o� 4 /7 W-/4/ 5 ? J - cif E✓n %ti v a`s l/ /, )4)- 7e ,4DIIN �IVG12 /0ot) 4ay cD/ (o,g) - O rieevw_ � 2 9�y - d_- �`� e r r— �[ (11!9 C. ? E .ts5 A6 ✓t c v /L itr c ( ((e 6%, c GX e k. ' zb / 4ItLe yfralke4.) LU SC eze. GL sl/d ei5 cs r�Jr G� a C/ P f- __e Ylz i`edosed raps— Page 1 Note for Carla Sanderson From: Greg Nizich Date: Thu, Mar 17, 1994 10:22 AM Subject: W-S Lower Muddy Creek NC0050342 To: Carla Sanderson You probably know this, but just in case, Winston has an EA under review for 21 MGD. I sent two WLA sheets for 15 and 21 MGD down yesterday. We are going to proceed with our permitting schedule and go to public notice upon completion of the WLA and staff reports. If the EA has not been approved by that time, the permit renewal will not have an effluent sheet for 21 MGD, only for 15 MGD. If the EA is FONSIed by the notice date then it will have the expanded flow too. Thanks Greg. CoLed Ti mpeAh50-n e ems- 1/4-hts P-;(2-1° 10eh"- ��i�i L7 D -?xvt pittitec(J ''re -ram TOXICANT ANALYSIS ♦1� � Parameter = Cr Parameter = Cu Standard = 50 µg/I Standard = 7 µg/I n BDL=1/2DL Actual Data RESULTS n BDL=1/2DL Actual Data RESULTS 1 1 Std Dev. 0.653862548 1 7 Std Dev. 3.818 2 2 Mean 1.916666667 2 11 Mean 9.167 3 1 C.V. 0.341145677 3 9 C.V. 0.417 4 2 4 10 5 3 5 12 6 2 Mult Factor = _ ._ _ 1.6 6 7 Mult Factor = 1.7, 22 µg/I µg/i µg/I 7 2 Max. Value 3 jig/1 7 9 Max. Value 8 1 Max. Pred Cw 4.8 pg/I 8 7 Max. Pred Cw 37.4 9 2 Allowable Cw 901.0 ,µg/I 9 8 Allowable Cw 126.1 10 3 10 10 11 2 11 22 12 2 12 15 13 2 13 9 14 1 14 6 15 1 15 10 16 1 16 7 17 2 17 10 18 2 18 9 19 3 19 11 20 2 20 12 21 2 21 6 22 2 22 5 23 2 23 4 24 3 24 4 5/4/94 PAGE TOXICANT ANALYSIS Parameter = Ni .r Parameter = Zn Standard = 25 Nil Standard = 50 µg/I n BDL=1/2DL Actual Data RESULTS n BDL=1/2DL Actual Data RESULTS 1 2 Std Dev. 4.132 1 42 Std Dev. 143.29 2 7 Mean 11.13 2 56 Mean 83.208 3 12 C.V. 0.371 _ _ 3 90 C.V. 1.7221 4 12 4 92 5 11 5 77 6 13 Mult Factor = ° 1.6 6 53 Mult Factor = 5.1 7 10 Max. Value 21 µg/I 7 75 Max. Value 750 µg/I 8 10 Max. Pred Cw 33.6 µg/I 8 48 Max. Pred Cw 3825 µg/I 9 10 Allowable Cw 450.5 µg/I 9 44 Allowable Cw 901.0 µg/I 10 12 �;-, 10 43 11 17 11 58 12 21 'fir: 12 53 13 13 13 41 14 11 g. 14 43 15 12 15 101 16 14 16 41 17 19 17 750 18 7 18 56 19 10 19 46 20 10 20 44 21 13 a 21 34 22 8 22 31 23 7 ,:' 23 39 24 6 24 40 5/4/94 PAGE TOXICANT ANALYSIS Parameter = Pb<, Parameter = Cd Standard = 25 µg/I >♦ Standard = 2 µg/1 n BDL=1/2DL Actual Data RESULTS n BDL=1/2DL Actual Data RESULTS 1 7 Std Dev. 1.35935 1 0.5 Std Dev. 0.66167 2 10 Mean 8.25 2 0.7 Mean 2.07083 3 9 C.V. 0.16477 3 3 C.V. 0.31952 4 9 4 2.5 5 9 5 2 6 7 Mult Factor = 1.2' ;; < 6 1.5 Mult Factor = 7 8 Max. Value 12 kg/I 7 2 Max. Value 3 11g/1 µg/I µg/I 8 7 Max. Pred Cw 14.4 kg/I 8 2 Max. Pred C 0 9 9 Allowable Cw 450.5 kg/I 9 2.5 Allowable Cw 36.0 10 9 10 2 11 9 11 3 12 7 12 2 13 12 13 3 14 8 14 2.5 15 9 15 2.5 16 10 •�= 16 .9 3 17 9 17 2 18 8 "`;,:> 18 1.5 19 7 19 1.5 20 8 20 2.5 21 7 21 2 22 6 22 1.5 23 7 #` 23 2 24 7 y ` ` 24 2 5/4/94 PAGE eta _ ,► i Cicts aol �a & A : 171 e s nA,'95° 7 ,D-= 5"645 1 1 aa,o wtdiP )4t- 6.1_11)6 _IAA 2 --SA N fl Ca, /VCooso3'/Z M J C. k)z, -FP Ct /w /hTC5 1t` At 4 ,;h pa 1 [ Irirt..1 ti ryr�� 014,47 r cd 74 12e oLl W es. et Q 4.^r ti 14) i n v �i (/aft u ✓l. • G 579g /mac 7”9, 799; 10Z,A,t FILL? 1C / fir'` Va/�'"Y.i IMP 41.e.- .La-1z ak'iC. hc'x Gti t444'- ' Alt/ i-d-ta / ( cI Gb4CG G4� k>o�L i "fit } :nn G�Lcr /i l _, /p'iA P f yljo N.41 . IL Do o/ /a. Z1 M� �, ;1. ,( �a urea Q i c. - �; • _ Get _ _�,t c t 1- -Leo 11. 1 ,- ,1) h 4` C:,�/.,a. V r -' %iC 1 A �: G';- .I'k5 i . P n 7 y (. I L 6._ ,G fans - h,J N 1-3 ; ..a a , i rt.d't.ai ' 3,1,7 a p Ur1L 2E et. L,P f�PE 001 1C itt& o / SS 4,l s/' D /oo Z/ /46 p • /, S7 Z1' 1,5-5 f- SSy - ss././ c. f f� 2�3 PIPE ZOOZ (WC 1�AI& P - /, sS ccf 5I/4n KAG • 1, 5-c simG p S5 s Z/ MC7 % SS r/s iC, - 't114-O ila / C P, Pe 00 i'/0rurP1.1 ACE, FLoo (Az (7) ISNIGO ZI /11 G 0 1/) ZDO l�L6ili )rn fltinl r ZS 3o Zoo IL/ /h13 Z5 64.E a . 540 Ft" 5 P, PL COZ ISNI6D ZI AMGD Z3- 30 L� 30 2ao Zoo 471 2/ riL ;r Z8 30 37 0 nun , ntzin ;in; rr� Gty( e&pt 'ta on !e iYl vc (d, Ci, a; Alm rte., %c f-r4. .b04( alt; ;_cc 4ia 3/3 P LtaL5 ohld F44, 40 JR • Po-b eY‘. �'L�-e �1r� �i 4✓Le. �ae �z� �.uan_�: �vu � ,�n M? l " �•.� LT - tea, 44i4 U u o c f% o P::. t aye Av.aid1 C`t, / 1444 urvv/ _ kz.f-{ abc , ,Lizzilef/L_ &Lt., 4-6)(0 u5;1_5 ‘4146;s Do .1 4,iff b iomA4 J - 0 IL_ /1,44,16 by c.c,, 001,1114 LOt, cYWA a/ c o 44 o a z __��„�� sly Awy 64/ GKEX88/MP COMPLIANCE EVALUATION ANALYSIS REPORT 03/15/94 PAGE 1 PERMIT--NC0050342 PIPE--001 REPORT PERIOD: 9302-9401 LOC---E FACILITY--WINSTON-SALEM (LOWER MUDDY CK) DESIGN FLOW-- 15.0000 CLASS--4 LOCATION--WINSTON SALEM REGION/COUNTY--04 FORSYTH 50050 00530 00610 31616 50060 TGA3B THP3B 00010 MONTH Q/MGD RES/TSS NH3-N FEC COLI CHLORINE CERI48PF CER7DCHV TEMP LIMIT F15.0000 F 30.0 NOL F 1000.0 NOL NOL 93/02 13.7321 7.1 13.48 12.8 .309 15.42 LIMIT F15.0000 F 30.0 NOL F 1000.0 NOL NOL NOL NOL 93/03 18.3548F 10.0 7.92 15.0 .520 14.87 LIMIT NOL F 30.0 NOL F 1000.0 NOL NOL NOL NOL 93/04 15.3066 6.2 8.61 5.0 .495 1 16 16.96 LIMIT F15.0000 F 30.0 NOL F 1000.0 NOL NOL NOL NOL 93/05 13.3096 5.7 6.30 6.2 .320 20.00 93/06 12.5566 8.4 6.66 23.6 .262 22.86 93/07 12.5935 7.3 4.30 78.5 .191 1 16 25.16 93/08 13.6677 10.8 2.25 261.4 .289 25.90 93/09 14.1500 11.4 4.20 75.0 .531 25.90 93/10 13.2032 13.2 3.20 161.1 .443 1 16 23.16 93/11 13.4733 9.6 3.24 23.1 .431 20.60 93/12 14.0741 17.8 5.64 24.4 .353 17.58 94/01 14.5483 8.9 6.86 14.9 .365 1 5 15.09 AVERAGE 14.0808 9.7 6.05 58.4 .375 1 13 20.29 MAXIMUM 35.2000 67.0 24.50 33600.0 2.000 1 16 28.00 MINIMUM 10.7000 2.0 .10 .0 .020 1 5 12.00 UNIT MGD MG/L MG/L #/100ML MG/L PASS/FAI PASS/FAI DEG.0 GKEX88/MP COMPLIANCE EVALUATION ANALYSIS REPORT 03/15/94 PAGE 2 PERMIT--NC0050342 PIPE--001 REPORT PERIOD: 9302-9401 LOC---E FACILITY--WINSTON-SALEM (LOWER MUDDY CK) DESIGN FLOW-- 15.0000 CLASS--4 LOCATION--WINSTON SALEM REGION/COUNTY--04 FORSYTH 00400 00600 00665 01051 78141 80082 MONTH PH TOTAL N PHOS-TOT LEAD TTO BOD 20C LIMIT 9.0 6.0 NOL NOL NOL F 25.00 93/02 7.2-6.8 2.2666 8.0000 5.65 LIMIT 9.0 6.0 NOL NOL NOL NOL F 25.00 93/03 7.1-6.6 16.333 2.0000 7.0000 6.18 LIMIT 9.0 6.0 NOL NOL NOL NOL F 25.00 93/04 7.2-6.6 10.000 1.9000 7.0000 LIMIT 9.0 6.0 NOL NOL NOL NOL F 25.00 93/05 7.1-6.6 15.000 2.0000 6.5000 5.61 93/06 7.2-6.6 19.333 3.0000 7.5000 93/07 7.0-6.5 16.000 3.4000 8.5000 8.26 93/08 7.0-6.3 7.000 3.0000 9.5000 6.82 93/09 7.2-6.5 18.000 3.9000 10.0000 7.85 93/10 7.2-6.4 20.666 3.3000 8.0000 5.95 93/11 7.0-6.4 14.000 3.5000 9.0000 4.89 93/12 7.0-6.6 18.000 3.4000 7.5000 8.66 94/01 7.2-6.3 13.000 2.4000 8.0000 5.42 AVERAGE 15.212 2.8388 8.0416 6.52 MAXIMUM 7.200 27.000 3.9000 12.0000 29.00 MINIMUM 6.300 7.000 1.6000 6.0000 2.00 UNIT SU MG/L MG/L UG/L MG/L MG/L GKEX88/MP COMPLIANCE EVALUATION ANALYSIS REPORT 03/15/94 PAGE 1 PERMIT--NC0050342 PIPE--001 REPORT PERIOD: 9202-9301 LOC---E FACILITY--WINSTON-SALEM (LOWER MUDDY CK) DESIGN FLOW-- 15.0000 CLASS--4 LOCATION--WINSTON SALEM REGION/COUNTY--04 FORSYTH 50050 00530 00610 31616 50060 TGA3B THP3B 00010 MONTH Q/MGD RES/TSS NH3-N FEC COLI CHLORINE CERI48PF CER7DCHV TEMP LIMIT F15.0000 F 30.0 NOL F 1000.0 NOL NOL NOL NOL 92/02 12.1965 12.0 4.86 27.1 .316 17.13 92/03 13.2645 8.2 11.39 5.4 .396 17.16 92/04 13.9500 10.9 8.80 18.2 .322 92/05 14.1806 7.9 5.54 32.2 .389 92/06 12.9166 6.8 1.68 20.3 .197 92/07 11.8096 5.7 1.78 62.5 .247 92/08 13.0000 7.5 2.14 72.0 .263 92/09 12.0300 6.5 2.96 7.6 .423 92/10 12.6580 6.9 3.03 13.9 .255 92/11 13.3500 6.5 8.07 28.0 .265 92/12 12.5741 6.6 13.95 17.7 .260 93/01 17.1516F 9.4 4.55 21.3 .402 AVERAGE 13.2567 7.9 5.72 27.1 MAXIMUM 30.8000 39.0 24.90 28300.0 MINIMUM 9.5000 1.0 .10 .0 UNIT MGD MG/L MG/L #/100ML 1 18.96 20.16 22.53 24.74 25.19 25.13 22.35 20.06 17.25 16.16 .311 1 20.56 1.550 1 28.00 .000 1 14.00 MG/L PASS/FAI PASS/FAI DEG.0 GKEX88/MP COMPLIANCE EVALUATION ANALYSIS REPORT 03/15/94 PAGE 2 PERMIT--NC0050342 PIPE--001 REPORT PERIOD: 9202-9301 LOC---E FACILITY--WINSTON-SALEM (LOWER MUDDY CK) DESIGN FLOW-- 15.0000 CLASS--4 LOCATION--WINSTON SALEM REGION/COUNTY--04 FORSYTH 00400 00600 00665 01051 78141 80082 MONTH PH TOTAL N PHOS-TOT LEAD TTO BOD 20C LIMIT 9.0 6.0 NOL NOL NOL NOL F 25.00 92/02 7.0-6.5 19.000 3.0500 7.0000 8.50 92/03 7.1-6.9 19.000 3.5333 9.5000 8.30 92/04 7.1-6.8 16.000 4.4000 9.5000 92/05 7.2-6.8 17.000 2.7000 8.0000 7.80 92/06 7.3-6.4 11.000 3.0000 7.5000 4.80 92/07 7.1-6.4 13.000 4.3500 6.0000 5.66 92/08 7.0-6.5 12.000 2.8500 8.0000 5.86 92/09 6.8-6.2 24.000 3.6000 6.5000 6.09 92/10 6.9-6.2 23.000 2.8500 8.0000 5.42 92/11 7.0-6.5 13.000 2.7000 8.0000 7.25 92/12 7.1-6.8 16.000 2.5500 6.5000 6.10 93/01 7.0-6.5 13.000 1.7000 8.5000 6.00 AVERAGE 16.333 3.1069 7.7500 6.52 MAXIMUM 7.300 24.000 5.2000 11.0000 29.00 MINIMUM 6.200 10.000 1.7000 6.0000 2.00 UNIT SU MG/L MG/L UG/L MG/L MG/L WHOLE EFFLUENT TOXICITY TESTING 0[SELF-MONITORING SUMMARY] Mon, Apr 18, 1994 FACII.I' REQUIREMENT YEAR JAN MAR Y JIUN JI11 Al ICI CF•.P WILvtINGTON SIIIPYARD, INC PERM AC MONIT: 2411R ITI1D !WENS (GRAB) NC0068004/001 Begin:12/1/92 Frequency: OWU NonComp: County:NI W IIANOVER Region: WINO Subbnsin: C1'PI6 VARIED VARIIED Special 7Q10: TIDAL. IWC(%):NA Omer: 00 91 02PP: 03 04 .. -•• --t -' f w: tit E ;+ ari tq - PAa., Y 90 NONE 91 - 92 -- 93 - 94 - PASS PASS - - -- - FAIL( PASS PASS - PASSI - ••• - - PASS - PASSI PASSI PASS PASS --- - - - - PASSI - PASSI FAIL' FAIL PASS -•- PASS PASS WIL.4INGTON SOUTIISIDG WWTP PERM: 24HR I'll' AC LIM UAI'H NC0023973/001 Begin:9/1/91 Frequency: Q A MAR JUN SLIP DEC NonComp: County:NEW 11ANOVIIR Region: WIRO Subbasin: CPF17 PI: 12.00 Special 7Q10: 1149 IWC(%):1.59 Order. 90 - 91 - 92 - 93 - 94 - PASS PASS FAILSIG PASS LATE.FAIL -- - FAIL - PASS - - PASS ,FAIL -- PASS PASS PASS NFi/FAIL - - - FAIL • - - - PASS PASS PASS FAIL PASS - - PASS ••• -- -• --- --- PASS PASS PASS PASS - -- - - WILSON WWrP PERM CHR LIM:94% NC0023906/001 Begin:2/1/90 Frequency: Q PJF A FEB MAY AUG NOV NonComp: County: WISON Region: RRO Subbnsin: NL U07 PF: Special 7QI02� IWC(%):97.37 Order 90 - - •- - - - FAIL . FAIL FAIL FAIL FAIL FAIL WINDSOR WWTP PERM CHR LIM:90% NC0026751/001 Begin:8/1/93 Frequency: Q P/F A JAN APR JUL OCT NonComp:SINGLE 91 FAIL PASS - PA - - FAIL PASS - PASS -- -- County:BERTIE Region: WARD Subbnsin: ROAIO 92 PASS - - PASS - - PASS - -- FAIL NI PASS PF:115 Special 93 PASS - •-- FAIL NR/PASS - FAIL FAIL PASS PASS •-• -- 7Q10:0.0 IWC(%): 100.0 Order. 94 PASS - 90 - -- - -- - - - -- •-• - - - WINSTON-SALI N ARCHIE FLL:DGE WWIP P2 PERM CDR MONIT: ChV (38, 48. 76, 86,96) Q•WIN1L'R; NC0037834/001 Begin:5/1/93 Frequency: M JAN APR JUL OCT NonComp:Chr Avg 91 - - - - - - - - -- -- -- -- County:FORSYTif Region: WSRO Subbasin: YADO4 92 - - - - - - - - -- --- >96.0 - PF:30 Special 93 >96.0 - -• 54.0 >98.0 91.0 27.0 54.0 27.0 >06.0 -•- -•• 7Q10: 15.000 IWC(%):75.6 Order. 94 <19.0 •- 90 MI fA - - -- - -• - --- PASS --• •- WINSTON-SALEM LOWER MUDDY CRK PERM CHR LIM:4.0% NC0050342/001 Bcgin:9/I/89 Frequency: Q 1'/F A JAN APR JUI. ocr NonComp: 91 PASS - -- PASS - •- PASS - - PASS -•• ••- County:FORSYTII Region: WSRO Subbasin: YADO4 92 PASS - -- PASS - - >16 - -- >16.0 -• ••- PP: 15.0 Special 93 >16.0 -- •- >16.0 - - >16.0 - - >16.0 -- - 7010: 554.0 IWC(%):4.02 Order: 04 5.6 -- 90 W0001IN SANfrARY WA'I1iR & SEWER PERM CIIR LIM: 8% NC0083178/001 Begin:4/1/94 Frequency: Q P/F A JAN APR JUL OCT NonComp:SINGLE 91 County:BUNCOMBE Region: ARO Subbasin: FRB 02 PF: Special 93 7Q10: IWC(%): Order. 94 90 - - - -- - - M1 NH NR hFI NR Ni WORTI I CHEMICAL CORP. PERM CIIR LIM:22%(GRA10) NC0078000/001 Begin:4/2/90 Frequency: Q PA, A JAN APR JUL OCT NonComp: 91 MI - -- (d] - - H - - -- - - County:GUILFORU Region: WSRO Subbasin:CP1:02 02 -- - •-- - -- - - - __ PP:0.216 Special 03 PASS - - PASS - -- PASS - - PASS 7Q10: 1.2 IWC(%):21.8 Order. 94 PASS -- 90 -- -- - - -• - - - - -- -- •- WRIGHT CHEMICAL CORP/002 PI.RM CIIR LIM: 26% UNTIL 12/3I/94 NC0003395/002 Begin:3/1/93 Frequency: Q P/F A FEB MAY AUG NOV NonComp:SINGLE 91 -- - - -- •- -- - - •-- ••• County:COLUMBUS Region: WIRO Subbasin: CPFI7 92 •- - -- -- •- - - - •- ... PF:0.135 Special 93 •- - •- - PASS - -- NR/PASS - ••- PASS --- 7Q10:0.6 1WC(%):25.8 Omer. 94 - PASS 90 - - -•- - - -- - - - - WYSONG & MILES CO/003 PERM CHR LIM: 90% (GRAB) NC0027553/003 Begin:12/4/92 Frequency: Q P/F A JAN APR JUL OCT NonComp:SINGLE 91 -• - - -- - - - -- •-- •-• "• --- County:GUILPORD Region: WSRO Subbasin: CPF02 92 - --• - - •-• -- - - - -. •- - PF: 0.0504 Special 93 1 - - I - - I - -- 1 ••• •-• 7Q10: 0.0 IWC(%):100.0 Order. 94 1 0 2 consecutive failures = significant noncompliance Y Pre 1990 Data Available LEGEND: PERM = Permit Requirement LEr= Administrative Letter - Target Frequency = Monitoring frequency: Q- Quaderly: M- Monthly; BM- Bimonthly: SA- Semiannually: A- Annually; OWD- Only when discharging; 1)- Discontinued nmuiturinq: n-quirena•ul: IS• ('onducting independent study Begin = Irma month required 7Q10 n Receiving stream low flow criterion (els) A = quarterly monitoring increases to monthly upon single failure Months that testing must occur • ex. JAN,AI'R,JI II„UCr Noutomp = Current (' plunge Requirement PP= Permitted flow (MGD) IWC%= (astir -tun waste conccntntion I'/F = Pass/Pail chronic test AC = Acute CIIR = Chronic Data Notation: f - Fathead Minnow; • - Ceriodaphnia so.: my - Mvsid shrimp: CIO/ - Cltronic value: P • Mortality of stared percentage at highest concentration: at - Performed by DEM Au Tox Croup: bi - Bad lest Reporting Notation: - = Data not required; NR - Not reported; ( ) - Beginning of Quarter Facility Activity Status: 1 • Inactive, N - Newly lssucd(To construct); 11 - Active but not discharging; t-Morc data available for month in question SIG = ()RC signature ncedr:d 56 INSTMON.XLS INSTREAM MONITORING Upstream Location: Idol's Dam Month Min DO Ave DO Max CBOD5 Ave CBOD5 Ave Cond Max NH3 Ave NH3 Max FC Ave FC Ave Temp Pb (mg/D (mg/) (mg/D (mg/I) (umhos) (mg/D (mg/I) _ (/100mD (/ 100mD (deg C) (ug/I) Mar-94 9.2 10.0 <2 <2 51 0.2 0.1 7100 473 10 Feb-94 11.6 12.2 <2 <2 62 0.1 <.01 550 288 5 Jan-94 9.0 10.7 <2 <2 68 0.2 0.1 2500 390 11 25 Dec-93 8.8 11.2 2 <2 69 <0.1 <0.1 2700 558 10 Nov 93 8.9 9.4 <2 <2 84 <0.1 <0.1 2400 590 16 Oct-93 7.9 8.5 <2 <2 103 <0.1 <0.1 200 126 18 4 Sep-93 6.8 7.7 <2 <2 78 0.1 <0.1 1200 413 22 Aug-93 6.1 6.9 <2 <2 75 0.1 <0.1 1700 412 24 4 Jul-93 6.0 6.4 <2 <2 65 <0.1 <0.1 2100 468, 26 Jun-93 7.0 7.5 <2 <2 58 0.1 <0.1 610 144 22 May-93 8.3 8.5 <2 <2 56 0.1 <0.1 >3980 >576 18 Apr-93 8.8 9.6 <2 <2 51 0.1 <0.1 3080 308 13 3 Mar-93 9.0 9.6 2 <2 57 0.1 <0.1 2180 459 12 Feb-93 8.8 8.9 2 <2 59 0.1 <0.1 700 <233 14 Jan-93 9.0 9.7 1 <1 57 <0.1 <0.1 780 188 14 3 Dec-92 8.9 11.0 1 <1 82 <0.1 <0.1 500 126 9 Nov 92 8.6 10.0 1 1 61 0.1, 0.1 2940 660 11 Oct-92 8.5 9.1 2 1 72 <0.1 <0.1_ 11000 422 13 7 Sep-92 7.0 7.3 2 1 82 <0.1 <0.1 860 329 21 Aug-92 6.4 6.9 2 , 1 72 0.2 <0.1 450 179 23 Jul-92 6.3 6.6 1 <1 63 0.8 <0.3 1000 228 25 5 Jun-92 7.3 7.9 1 <1 54 0.2 0.1 220 683 19 May-92 7.9 8.1 2 <1 62 0.2 0.2 1020 215 18 Apr-92 7.5 8.8 2 1 63 0.4 0.2 480 98 16 6 Mar-92 9.2 10.4 3 2 64 0.2 0.1 1380 149 10 Feb-92 8.8 9.2 2 1 118 0.1 :<0.1 3775 <206 16 Jan-92 8.9 10.2 <1 <1 68 0.1 0.1 660 409 13 7V Page 1 INSTMON.XLS Downstream Location: US64 Month Min DO Ave DO Max CBOD5 Ave CBOD5 Ave Cond Max NH3 Ave NH3 Max FC Ave FC Ave Temp Pb (mg/I) (mg/I) (mg/I) (mg/I) (umhos) (mg/I) (mg/I) _ (/100m1) (/100mI) (deg C) 11 (ug/I) Mar-94 7.7 9.8 2 <2 81 0.2 0.1 11000 528 Feb-94 9.2 11.5 <2 <2 90 0.2 0.1 1300 374 6 Jan-94 9.0 9.1 <2 <2 86 0.3 0.2 2900 1649 13 23 Dec-93 8.8 11.1 2 <2 89 0.3 <0.2 3200 1541 10 Nov-93 8.9 9.4 <2 <2 123 0.1 <0.1 2700 630 17 Oct-93 7.8 8.3 <2 <2 149 0.1 <0.1 300 144 18 4 Sep-93 7.3 8.2 <2 <2 120 0.2 <0.1 900 245 21 Aug-93 6.6 7.2 <2 <2 114 <0.1 <0.1 6527 720 24 4 Jul-93 6.2 6.6 2 <2 104 0.2 0.1 11000 2008 26 Jun-93 7.1 7.8 <2 <2 89 0.3 0.1 >3000 >271 22 May-93 8.4 8.8 <2 <2 73 0.2 0.1 >2410 >407 19 Apr-93 9.1 9.9 <2 <2 63 0.2 0.1 2880 472 13 4 Mar-93 9.0 9.8 <2 <2 70 0.1 <0.1 3320 253 12 Feb-93 8.8 9.0 2 , <2 76 177 75 650 <184 13 _ Jan-93 9.0 9.7 3 1 77 0.1 0.1 550 107 15 4 Dec-92 8.8 11.2 1 <1 86 0.2 0.1 650 <164 9 Nov 92 9.4 10.6 2 1 87 0.2 <0.1 1450 577 11 Oct-92 8.8 9.4 2 1 103 0.1 <0.1 6200 391 14 10 Sep-92 7.9 8.1 2 1 107 2 <0.1 6400 648 21 Aug-92 7.2 7.8 2 <1 108 0.3 <0.1 540 271 23 JuI-92 7.0 7.3 1 <1 171 0.7 <0.3 870 400 25 8 Jun-92 7.9 8.5 2 <1 70 0.1 0.1 2900 >534 20 May-92 8.2, 8.6 2 1 85 0.2 0.1 2090 303 18 Apr-92 8.1 9.2 2 2 88 0.4 0.3 525 93 15 8 Mar-92 9.9 10.7 4 2 91 0.2 0.2 >2200 >825 11 Feb-92 8.8 9.0 2 1 109 0.3 0.2 460 170 18 Jan-92 9.0 10.6 2 <1 114 0.1 0.1 1200 255 12 7 Page 2 State of North Carolina Department of Environment, Health and Natural Resources Division of Environmental Management James B. Hunt, Jr., Governor Jonathan B. Howes, Secretary A. Preston Howard, Jr., P.E., Director April 19, 1994 Mr. Stan Webb Lower Muddy Creek WWTP 4561 Cooper Road Winston-Salem, NC 27127 Subject: Limits at 21 MGD NPDES Permit #NC0050342 Lower Muddy Creek WWTP Forsyth County Dear Mr. Webb: This is to summarize our discussion today concerning the limits for the expanded flow of 21.0 MGD. The only change foreseen at this time is a summer limit for N1-I3 of 14.0 mg/l. With regards to metals limits, the preliminary wasteload allocation work is expected to be completed in early May and I will notify you of any additional changes at that time. If you have any questions please contact me at (919) 733-5083, ext. 541. Sincerely, (1'. /1/6 Greg Nizich, Environmental Engineer NPDES Permits Group cc: Winston-Salem Regional Office Instream Assessment Unit Permit File P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone 919-733-5083 FAX 919-733-9919 An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper Division of Environmental Management MEMO To: basin files From: Tess Gidley Date: 13 May 1994 RE: lead in Yadkin River A review of Muddy Creek WWTP instream monitoring data showed high instream lead concentrations. One upstream sample was at the state lead standard of 25 ug/1. The upstream samples are taken at Idol's Dam on the Yadkin River. This will need further investigation for the basin plan. cc: Muddy Creek WLA files Muddy Creek/Yadkin River 45 40 35 30 25 20 milepoint add Ct . disctiv, ok.40 LIAd kwL e 21 /G I), Bops 15 10 5 0 8 7 6 3 2 1 NEW.OUT Mile DO BOD ORGN NH3N NO2N NO3N MG/L MG/L MG/L MG/L MG/L MG/L 40.8 7.33 3.24 0.28 0.17 0 1.07 40.6 5.46 40.66 2.61 2.3 0.01 2.41 40.4 5.3 40.23 2.59 2.29 0.03 2.41 40.2 5.16 39.81 2.57 2.29 0.04 2.41 40 5.04 39.39 2.55 2.28 0.06 2.41 39.8 4.92 38.98 2.53 2.27 0.07 2.41 39.6 4.81 38.57 2.51 2.27 0.09 2.41 39.4 4.71 38.17 2.49 2.26 0.1 2.41 39.2 4.62 37.77 2.47 2.25 0.11 2.41 39 4.54 37.38 2.46 2.25 0.13 2.41 38.8 4.47 36.99 2.44 2.24 0.14 2.41 38.6 4.4 36.6 2.42 2.23 0.15 2.41 38.4 4.34 36.22 2.4 2.23 0.16 2.41 38.2 4.76 30.6 2.01 1.87 0.15 2.09 38 4.67 30.25 2 1.86 0.16 2.09 37.8 4.59 29.9 1.98 1.86 0.17 2.09 37.6 4.51 29.56 1.97 1.85 0.18 2.1 37.4 4.44 29.22 1.95 1.84 0.19 2.1 37.2 4.38 28.89 1.94 1.84 0.2 2.1 37 4.61 26.4 1.78 1.68 0.19 1.98 36.8 4.57 26.11 1.76 1.67 0.2 1.98 36.6 4.54 25.87 1.75 1.66 0.21 1.98 36.4 4.51 25.64 1.74 1.66 0.22 1.98 36.2 4.53 25.32 1.71 1.64 0.22 1.98 36 4.53 25.14 1.7 1.64 0.23 1.98 35.8 4.53 24.96 1.69 1.64 0.24 1.99 35.6 4.53 24.78 1.68 1.63 0.25 1.99 35.4 4.53 24.61 1.67 1.63 0.25 2 35.2 4.53 24.43 1.65 1.62 0.26 2 35 4.54 24.26 1.64 1.62 0.27 2.01 34.8 4.54 24.09 1.63 1.61 0.27 2.01 34.6 4.55 23.92 1.62 1.61 0.28 2.02 34.4 4.55 23.75 1.61 1.61 0.29 2.02 34.2 4.56 23.58 1.6 1.6 0.29 2.03 34 4.56 23.41 1.59 1.6 0.3 2.04 33.8 4.57 23.24 1.57 1.59 0.31 2.04 33.6 4.58 23.08 1.56 1.59 0.31 2.05 33.4 4.58 22.91 1.55 1.58 0.32 2.05 33.2 4.59 22.75 1.54 1.58 0.32 2.06 33 4.6 22.59 1.53 1.57 0.33 2.07 32.8 4.61 22.43 1.52 1.57 0.33 2.07 32.6 4.61 22.27 1.51 1.57 0.34 2.08 32.4 4.62 22.11 1.5 1.56 0.34 2.09 32.2 4.68 21.81 1.47 1.54 0.34 2.08 32 7.2 2.54 0.28 1 0 1.07 31.8 6.76 9.11 0.45 1.77 0.01 1.17 Page 1 NEW.OUT 31.6 6.47 10.79 0.59 1.75 0.06 1.28 31.4 6.45 10.76 0.58 1.74 0.06 1.28 31.2 6.42 10.74 0.58 1.73 0.07 1.28 31 6.4 10.71 0.58 1.73 0.07 1.28 30.8 6.38 10.69 0.58 1.72 0.08 1.28 30.6 6.36 10.66 0.57 1.72 0.09 1.28 30.4 6.34 10.63 0.57 1.71 0.09 1.29 30.2 6.32 10.6 0.57 1.7 0.1 1.29 30 6.3 10.58 0.57 1.7 0.1 1.29 29.8 6.28 10.55 0.57 1.69 0.11 1.29 29.6 6.26 10.52 0.56 1.69 0.12 1.29 29.4 6.24 10.5 0.56 1.68 0.12 1.29 29.2 6.22 10.47 0.56 1.68 0.13 1.29 29 6.22 10.38 0.55 1.66 0.13 1.29 28.8 6.2 10.36 0.55 1.65 0.14 1.29 28.6 6.18 10.33 0.55 1.64 0.14 1.29 28.4 6.17 10.3 0.55 1.64 0.15 1.29 28.2 6.15 10.28 0.55 1.63 0.15 1.29 28 6.13 10.25 0.54 1.63 0.16 1.3 27.8 6.12 10.23 0.54 1.62 0.16 1.3 27.6 6.11 10.2 0.54 1.62 0.17 1.3 27.4 6.09 10.18 0.54 1.61 0.17 1.3 27.2 6.08 10.15 0.54 1.6 0.18 1.3 27 6.06 10.12 0.53 1.6 0.18 1.3 26.8 6.05 10.1 0.53 1.59 0.19 1.31 26.6 6.04 10.07 0.53 1.59 0.19 1.31 26.4 6.02 10.05 0.53 1.58 0.19 1.31 26.2 6.01 10.02 0.53 1.58 0.2 1.31 26 6 10 0.52 1.57 0.2 1.31 25.8 5.99 9.97 0.52 1.57 0.21 1.32 25.6 5.98 9.95 0.52 1.56 0.21 1.32 25.4 5.97 9.91 0.52 1.55 0.21 1.32 25.2 5.96 9.89 0.51 1.55 0.22 1.32 25 5.95 9.86 0.51 1.54 0.22 1.32 24.8 5.94 9.84 0.51 1.54 0.23 1.33 24.6 5.93 9.81 0.51 1.53 0.23 1.33 24.4 5.92 9.79 0.51 1.53 0.23 1.33 24.2 5.91 9.76 0.51 1.52 0.24 1.33 24 5.9 9.74 0.5 1.52 0.24 1.34 23.8 5.89 9.71 0.5 1.51 0.24 1.34 23.6 5.88 9.69 0.5 1.51 0.25 1.34 23.4 5.87 9.66 0.5 1.5 0.25 1.34 23.2 5.87 9.64 0.5 1.5 0.25 1.35 23 5.86 9.62 0.49 1.49 0.26 1.35 22.8 5.85 9.59 0.49 1.49 0.26 1.35 22.6 5.85 9.54 0.49 1.47 0.26 1.35 22.4 5.84 9.51 0.49 1.47 0.27 1.35 22.2 5.84 9.49 0.49 1.46 0.27 1.36 22 5.83 9.47 0.48 1.46 0.27 1.36 Page 2 NEW.OUT 21.8 5.82 9.44 0.48 1.45 0.27 1.36 21.6 5.82 9.42 0.48 1.45 0.28 1.36 21.4 5.81 9.39 0.48 1.44 0.28 1.37 21.2 5.81 9.37 0.48 1.44 0.28 1.37 21 5.8 9.35 0.47 1.43 0.29 1.37 20.8 5.8 9.32 0.47 1.43 0.29 1.38 20.6 5.79 9.3 0.47 1.42 0.29 1.38 20.4 5.79 9.28 0.47 1.42 0.29 1.38 20.2 5.78 9.25 0.47 1.41 0.3 1.38 20 5.78 9.23 0.47 1.41 0.3 1.39 19.8 5.77 9.21 0.46 1.4 0.3 1.39 19.6 5.77 9.18 0.46 1.4 0.3 1.39 19.4 5.76 9.16 0.46 1.4 0.31 1.4 19.2 5.76 9.14 0.46 1.39 0.31 1.4 19 5.76 9.11 0.46 1.39 0.31 1.4 18.8 5.75 9.09 0.46 1.38 0.31 1.41 18.6 5.75 9.07 0.45 1.38 0.31 1.41 18.4 5.75 9.04 0.45 1.37 0.32 1.41 18.2 5.75 9.01 0.45 1.36 0.32 1.41 18 5.75 8.98 0.45 1.36 0.32 1.42 17.8 5.74 8.95 0.45 1.35 0.32 1.42 17.6 5.74 8.93 0.44 1.35 0.32 1.42 17.4 5.74 8.91 0.44 1.34 0.33 1.43 17.2 5.73 8.89 0.44 1.34 0.33 1.43 17 5.73 8.87 0.44 1.33 0.33 1.43 16.8 5.73 8.85 0.44 1.33 0.33 1.44 16.6 5.73 8.82 0.44 1.33 0.33 1.44 16.4 5.72 8.8 0.43 1.32 0.33 1.44 16.2 5.72 8.78 0.43 1.32 0.34 1.45 16 5.72 8.76 0.43 1.31 0.34 1.45 15.8 5.72 8.74 0.43 1.31 0.34 1.45 15.6 5.72 8.72 0.43 1.3 0.34 1.46 15.4 5.71 8.7 0.43 1.3 0.34 1.46 15.2 5.71 8.67 0.42 1.3 0.34 1.46 15 5.71 8.65 0.42 1.29 0.35 1.47 14.8 5.71 8.63 0.42 1.29 0.35 1.47 14.6 5.71 8.61 0.42 1.28 0.35 1.48 14.4 5.71 8.59 0.42 1.28 0.35 1.48 14.2 5.71 8.57 0.42 1.27 0.35 1.48 14 5.71 8.54 0.42 1.27 0.35 1.49 13.8 5.71 8.52 0.41 1.26 0.35 1.49 13.6 5.71 8.5 0.41 1.26 0.36 1.49 13.4 5.71 8.48 0.41 1.26 0.36 1.5 13.2 5.71 8.45 0.41 1.25 0.36 1.5 13 5.71 8.43 0.41 1.25 0.36 1.5 12.8 5.71 8.41 0.41 1.24 0.36 '1.51, 12.6 5.71 8.39 0.4 1.24 0.36 1.51' 12.4 5.71 8.37 0.4 1.23 0.36 1.51 12.2 5.71 8.35 0.4 1.23 0.36 1.52 Page 3 NEW.OUT 12 5.71 8.33 0.4 1.23 0.36 1.52 11.8 5.71 8.31 0.4 1.22 0.37 1.52 11.6 5.71 8.29 0.4 1.22 0.37 1.53 11.4 5.71 8.27 0.4 1.21 0.37 1.53 11.2 5.71 8.25 0.39 1.21 0.37 1.54 11 5.71 8.23 0.39 1.21 0.37 1.54 10.8 5.71 8.2 0.39 1.2 0.37 1.54 10.6 5.71 8.18 0.39 1.2 0.37 1.55 10.4 5.71 8.16 0.39 1.19 0.37 1.55 10.2 5.71 8.14 0.39 1.19 0.37 1.55 10 5.71 8.12 0.39 1.18 0.37 1.56 9.8 5.71 8.1 0.38 1.18 0.37 1.56 9.6 5.71 8.08 0.38 1.18 0.37 1.57 9.4 5.71 8.06 0.38 1.17 0.37 1.57 9.2 5.71 8.04 0.38 1.17 0.38 1.57 9 5.72 8.02 0.38 1.16 0.38 1.58 8.8 5.72 8 0.38 1.16 0.38 1.58 8.6 5.72 7.98 0.38 1.16 0.38 1.58 8.4 5.72 7.96 0.37 1.15 0.38 1.59 8.2 5.72 7.94 0.37 1.15 0.38 1.59 8 5.72 7.92 0.37 1.14 0.38 1.59 7.8 5.72 7.9 0.37 1.14 0.38 1.6 7.6 5.73 7.88 0.37 1.14 0.38 1.6 7.4 5.73 7.86 0.37 1.13 0.38 1.61 7.2 5.73 7.84 0.37 1.13 0.38 1.61 7 5.73 7.82 0.36 1.12 0.38 1.61 6.8 5.73 7.8 0.36 1.12 0.38 1.62 6.6 5.74 7.78 0.36 1.12 0.38 1.62 6.4 5.74 7.75 0.36 1.11 0.38 1.62 6.2 5.74 7.73 0.36 1.11 0.38 1.63 6 5.74 7.71 0.36 1.1 0.38 1.63 5.8 5.74 7.69 0.36 1.1 0.38 1.63 5.6 5.75 7.67 0.35 1.1 0.38 1.64 5.4 5.75 7.65 0.35 1.09 0.38 1.64 5.2 5.75 7.63 0.35 1.09 0.38 1.65 5 5.75 7.62 0.35 1.08 0.38 1.65 4.8 5.8 6.86 0.31 0.9 0.32 1.48 4.6 5.81 6.85 0.31 0.9 0.32 1.48 4.4 5.82 6.83 0.31 0.89 0.32 1.49 4.2 5.83 6.81 0.31 0.89 0.32 1.49 4 5.84 6.8 0.31 0.89 0.32 1.49 3.8 5.85 6.78 0.31 0.89 0.32 1.5 3.6 5.86 6.77 0.31 0.88 0.32 1.5 3.4 5.87 6.75 0.31 0.88 0.32 1.5 3.2 5.88 6.74 0.31 0.88 0.32 1.5 3 5.89 6.72 0.3 0.87 0.32 1.51 2.8 5.9 6.7 0.3 0.87 0.32 1.51 2.6 5.91 6.69 0.3 0.87 0.32 1.51 2.4 5.92 6.67 0.3 0.87 0.32 1.52 Page 4 NEW.OUT 2.2 5.93 6.66 0.3 0.86 0.32 1.52 2 5.94 6.64 0.3 0.86 0.32 1.52 1.8 5.94 6.63 0.3 0.86 0.32 1.53 1.6 5.95 6.61 0.3 0.86 0.32 1.53 1.4 5.96 6.6 0.3 0.85 0.32 1.53 1.2 5.97 6.58 0.29 0.85 0.32 1.53 _ 1 5.98 6.57 0.29 0.85 0.32 1.54 0.8 5.75 8.44 0.4 1.52 0.31 1.59 0.6 5.73 8.42 0.4 1.52 0.31 1.59 0.4 5.72 8.4 0.4 1.51 0.32 1.59 0.2 5.71 8.38 0.4 1.51 0.32 1.6 0 5.69 8.36 0.4 1.5 0.32 1.6 5.68 8.34 0.39 1.5 0.32 1.6 Page 5 cc: Permits and Engineering Technical Support Branch County Health Dept. Central Files WSRO SOC PRIORITY PROJECT: Yes No X To: Permits and Engineering Unit Water Quality Section Attention: (Greg Ni z ich)-- Date: April 18, 1994 NPDES STAFF REPORT AND RECOMMENDATION County Forsyth Permit No. NC0050342 PART I - GENERAL INFORMATION 1. Facility and Address: Muddy Creek WWTP Mailing Address: Facility Location: City of Winston-Salem 4561 Cooper Rd. PO Box 2511 W-S, NC Winston-Salem, NC 27102 2. Date of Investigation: March 10, 1994 3. Report Prepared by: Lee G. Spencer 4. Persons Contacted and Telephone Number: Stan Webb and Chris Shamel (910)784-4700 5. Directions to Site: From WSRO take North Point/Silas Creek Pkwy. west to Hwy 158 west (Stratford Rd.). Turn west and proceed several miles to Fraternity Church Road. Turn left and go about a mile to Cooper Rd. on the right. Turn right and go about 0.5 mile to WWTP road on the left, just before crossing creek. 6. Discharge Points(s), List for all discharge points: 001 - Latitude: 35°55'53" Longitude: 80°22'10" 002 - Latitude: 35°59'29" Longitude: 80°19'58" U.S.G.S. Quad No. D17NE U.S.G.S. Quad Name Welcome 7. Site size and expansion area consistent with application ? X Yes No If No, explain: 8. Topography (relationship to flood plain included): The WWTP sets along and immediately adjacent to the confluence of South Fork and Muddy Creek. Units are supposed to be designed with the flood plain in mind. The effluent outfall line flows adjacent to Muddy Creek for about 5 miles where it then discharges into the Yadkin River (001). If the river floods to a level where the gravity effluent line cannot discharge, then the outfall line is designed to surcharge and overflow into another line leading into Muddy Creek (002). This has happened once since 1986, per statement in the application. 9. Location of nearest dwelling: WWTP is fairly well isolated. No houses or businesses within 1000' of the treatment plant. 10. Receiving stream or affected surface waters: Yadkin River a. Classification: WS-IV b. River Basin and Subbasin No.: 03-07-04 c. Describe receiving stream features and pertinent downstream uses: Yadkin River flows through mostly rural residential and agricultural areas from this point to High Rock Lake. Various water supply intakes downstream. Part II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS 1. a. Volume of Wastewater to be permitted: (Ultimate Design Capacity) 21.0 MGD b. What is the current permitted capacity of the Waste Water Treatment facility? 15.0 MGD c. Actual treatment capacity of the current facility (current design capacity)? 15.0 MGD based on past permits. 21.0 MGD based on engineering review by consultant. d.. Date(s) and construction activities allowed by previous Authorizations to Construct issued in the previous two years. N/A e. Please provide a description of existing or substantially constructed wastewater treatment facilities: Screening and grit removal units; primary clarifiers(4); aeration tanks(3); final clarifiers(4); chlorination with chlorine contact chamber; and flow measurement. Sludge handling facilities consisting of anaerobic digesters; gravity thickener; sludge storage lagoons; belt filter press; and solids blending tanks. f. Please provide a description of proposed wastewater treatment facilities: N/A NPDES Permit Staff Report Version 10/92 Page 2 g. Possible toxic impacts to surface waters: The application states that chlorinated hydrocarbons known to be present in the effluent include: chloroform, Bromodichloromethane, and dibromochloromethane. h. Pretreatment Program (POTWs only): Approved. 2. Residuals handling and utilization/disposal scheme: a. If residuals are being land applied, please specify DEM permit no. WQ0000094. b. Residuals stabilization: PSRP * PFRP Other 3. Treatment plant classification (attach completed rating sheet): Class IV 4. SIC Code(s): 4952 Primary 01 Secondary 02 Main Treatment Unit Code: 0 1 0 x 3 PART III - OTHER PERTINENT INFORMATION 1. Is this facility being constructed with Construction Grant Funds or are any public monies involved? N/A 2. Special monitoring or limitations (including toxicity) requests: The city has requested that the permitted flow be increased to 21.0 MGD. It was our understanding in an earlier meeting with City personnel and Raleigh office staff, that this would be considered an expanded discharge, and as such, would bring on phosphorous limits. If this is the case, we would rather see the additional revenue required to meet a phosphorous limit applied to non -point sources (where the big problem lies). Toxicity monitoring and limitation should continue to be required after chlorination. 3. Important SOC, JOC or Compliance Schedule dates: N/A 4. Alternative Analysis Evaluation: N/A 5. Other Special Items: NPDES Permit Staff Report Version 10/92 Page 3 PART IV - EVALUATION AND RECOMMENDATIONS Winston-Salem appears to give above average attention to its wastewater treatment programs and systems. O&M program, pretreatment program and sludge management program are all generally outstanding. The City has requested to increase the permitted flow to 21.0 MGD. It is this office's understanding that the WWTP was "overdesigned" in anticipation of significant industrial waste contributions high in BOD. Operators state that these contributions never materialized. Indeed the WWTP is almost always operated with one of its large aeration tanks out of service. Provided that the consultant's report substantiates this claim of adequate treatment capacity at this increased flow rate, this office has no objection to the request. This office does not object to the reissuance of this permit along current Division guidelines. Signature of report preparer Water Quality Regifa1 Supervisor NPDES Permit Staff Report Version 10/92 4/3?4 Date 9"•Ar9)� Date Page 4 / • - /—••••. \ 7OO&-J-. \\T-I ) (37 r? 2 \_T'- • (i , -• ; .Prc-7\ • /„. Muddy Creelc WWTP NC0050342-002 NC0.05.0342-001 USGS Quad. No. : USGS Quad. Name: County: Davidson • # " ›.4 • \--:"\--7. o • • • - .<750= •-• . ,o! • • RECEIVING STREAM: Muddy Creek Stream Classification: WS-IV RECEIVING STREAM: Yadkin River Stream Classification: WS-IV D17-NE Welcome