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Home My WebLink AboutNC0021181_wasteload allocation_19930927NPDES WASTE LOAD ALLOCATION PERMIT NO.: NC0021181 PERMITTBE NAME: -CityofBelmont FACILITY NAME: Belmont Wastewater Treatment Plant Facility Status: Existing Permit Status: Renewal with Modification -• tqa Major q Minor Pipe No.: 001 Design Capacity: 5.0 MGD Domestic (% of Flow): 60 % Industrial (% of Flow): 40 % Continents: n er S to move discharge point to Catawba River in 1991 RECEIVING STREAM: the Catawba River Class: VS -and B CA Sub -Basin: 03-08-34 Reference USGS Quad: G14NE (please attach) County,. Gaston Regional Office: —Mooresville Regional Office Previous Exp. Date: 7/29/93 Treatment Plant Class: M Classification changes within three miles: Requested by: Charles Alvarez Date: 2/18/93 Prepared by: e ° A G Date: � -2/ 9.3 Reviewed y r Date: a�� ,ate . w��r2 EL Z7�q3 Modeler Date Rec. # SMII� 7 1� 43 Drainage Area (mil) ,v2615" Avg. Streamflow (cfs): 7Q10 (cfs) `% 3 Winter 7Q10 (cfs) 30Q2 (cfs) Toxicity Limits: IWC % Acu Chronic Instream Monitoring: Parameters ti�tc �• Upstream Y Location Downstream . Location / 0 . ' Effluent Characteristics Summer Winter BOD5 (m ) ?3 4,j NH3-N (mg/1) D.O. (mg/1) TSS (mg/1) EL,� F. Col. (/100 ml) 2 00 pH (SU) ' 9 v UFA rt _t OCT 1 1991 State of North Carolina Department of Environment, Health and Natural Resources Division - Division of Environmental Management - 512 North Salisbury Street • Raleigh, North Carolina 27611 James G. Martin, Governor William W. Cobey, Jr., Secretary Mr. Gerald Hatton 6715 Fairview Road Suite D Charlotte, NC 28210 Dear Mr. Hatton: George T. Everett, Ph.D Director October 16, 1991 Subject: City of Belmont NPDES Permit No. NCO021181 Gaston County The Division of Environmental Management has reviewed your letter of August 2, 1991 and has analyzed your wasteload allocation based on the flow of 5.0 MGD. Our modeling analysis indicates the following limits would be included in your permit at the time of renewal: BOD5 30 mg/l TSS 30 mg/l Fecal Coliform 200/100 ml pH 6-9 S.U. Also, daily maximum limits were established for the following metals: Cadmium 27 µg/1 Chromium 663 µg/l Cyanide 66 µg/l Mercury 0.16 µ/1 Monthly effluent monitoring requirements would also be included for copper, nickel, lead, zinc and silver and a chronic toxicity testing requirement with sampling in February, May, August and November. North Carolina has recently adopted an action level for total residual chlorine of 17 µg/1 to protect against chronic toxicity to aquatic life under low flow conditions. This will result in an effluent limit of 28 µg/l total residual chlorine being applied to the Belmont facility upon any upgrade of the facility. These limits are preliminary and could change based on additional review by the division staff and comments from the regional office. Consideration of protecting against acute toxicity in the mixing zone could result in more stringent metal requirements. Implementation of the basin -wide water quality management initiative in the Catawba River Basin in 1995 could result is stricter nutrient limitations. With this in mind, Belmont should consider designing the new facility such that biological nutrient removal and chemical polishing could be easily added. Pollution Prevention Pays P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone 919-733-7015 An Equal Opportunity Affirmative Action Employer Finally, color in the Catawba River Basin is a concern. Basin management plans are likely to develop strategies to address color. If significant industrial users (SIU) contribute color to Belmont's effluent, the Town may wish to begin building a database for color. Monitoring of the influent and effluent is units of ADMI with periodic sampling of the SIUs contributing the color is recommended. The Division hopes that this information, however preliminary, is helpful to the Town of Belmont in their planning for the future of the wastewater treatment facilities. If there are any further questions, please do not hesitate to contact us. S' rely, LdQEfrit,P-E Supervisor Permits and Engineering Unit cc: Mr. Trevor Clements Mooresville Regional Office FACT SHEET FOR WASTELOAD ALLOCATION Request # 7342 Facility Name: City of Belmont WWTP NPDES No.: NCO021181 P C- IDErT. OF NA:T'krkA.,. Type of Waste: 60% Domestic / 40% Industrialp0M U.N1TY DEVL1-0?-'1f Facility Status: Existing Permit Status: Renewal SEP 0 2 1993 Receiving Stream: atawba River Stream Classification:"N{" & B CA Subbasin: County: Regional Office: Requestor: Date of Request: Topo Quad: 030834 Gaston Mooresville Alvarez 2/19/93 G14NE VVISION OF EPRG!dt NT,V yDFE4C�Nr �ii stic. US GS # Date: Drainage Area (mi2): 2015 Summer 7Q10 (cfs): 95 (min. inst. rel.) Winter 7Q10 (cfs): Average Flow (cfs): 30Q2 (cfs): IWC (%): 8 Wasteload Allocation Summary (approach taken, correspondence with region, EPA, etc.) Facility requesting renewal of NPDES permit. Technical Support recommends renewal of existing conventional limits and effluent monitoring requirements for metals. Per Lake Wylie Management Study also recommend that Belmont be given a five year time period to apply state -of -art nutrient removal technology to meet limits of 0.5 mg/l total phosphorus and 4 mg/1 (summer) and 8 mg/l (winter) total nitrogen. Special Schedule Requirements and additional comments from Reviewers: Recommended by: 4 Date Reviewed by Instream Assessment: Regional Supervisor: Permits & Engineering: E'C& RETURN TO TECHNICAL SERVICES BY: 8/26/93 SEP 2 8 1993 2 Existing Limits: Wasteflow (MGD): BOD5 (mg4): NH3N (mg/1): DO (mg/l): TSS (mg/1): Fecal Col. (/100 ml): pH (SU): Residual Chlorine (µg/1): TP (mg/1): TN (mg/1): Recommended Limits: Monthly Average Summer Winter 5.0 30 monitor nr 30 200 6-9 monitor monitor monitor Monthly Average Summer Winter WQ or EL Wasteflow (MGD): 5.0 BODS (mg/1): 30 EL NH3N (mg/1): monitor DO (mg/1): nr TSS (mg/1): 30 EL Fecal Col. (/100 ml): 200 pH (SU): 6-9 Residual Chlorine (µg/1): monitor TP (mg/1): monitor* TN (mg/1): monitor* *Facility must meet 0.5 mg/1 TP and 4 mg/l (summer), 8 mg/l (winter) TN in 5 years per Lake Wylie Management Strategy. Limits Changes Due To: Parameter(s) Affected 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 (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 Type of Toxicity Test: Existing Limit: Recommended Limit: Monitoring Schedule: Existing Limits Copper (ug/1): Nickel (ug/l): Cyanide (ug/1): Mercury (ug/1): Recommended Limits Cadmium (ug/1): Copper (ug/1): Zinc (ug/1); Lead (ug/1): Nickel (ug/1): Cyanide (ug/1): Mercury (ug/1): TOMCS/METALS Chronic Pass/Fail Qrtrly 8% 8% FEB MAY AUG NOV Daily Max. monitor 330 66 0.2 Daily Max. monitor monitor monitor monitor monitor monitor monitor Limits Changes Due To: Change in 7Q10 data Change in stream classification Relocation of discharge Change in wasteflow New pretreatment information Failing toxicity test Other (onsite toxicity study, interaction, etc.) WQ or EL Parameter(s) Affected Ni (standard change) 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. •s No parameters are water quality limited, but this discharge may affect future allocations. 4 INSTREAM MONITORING REQUIREMENTS Upstream Location: Highway 74 Downstream Location: 1.0 mi. downstream of discharge Parameters: Temperature, D.O., Fecal Coliform, Conductivity Special instream monitoring locations or monitoring frequencies: MISCELLANEOUS INFORMATION & SPECIAL CONDITIONS Ade-quacy 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? 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. Facility Name City of Belmont WWTP Permit # NC0021181 _ Pipe # 001 CHRONIC TOXICITY PASS/FAIL PERMIT LIMIT (QRTRLY) The effluent discharge shall at no time exhibit chronic toxicity using test procedures outlined in: 1.) The North Carolina Ceriodaphnia chronic effluent bioassay procedure (North Carolina Chronic Bioassay Procedure - Revised *September 1989) or subsequent versions. The effluent concentration at which there may be no observable inhibition of reproduction or significant mortality is _8_% (defined as treatment two in the North Carolina procedure document). The permit holder shall perform quart r monitoring using this procedure to establish compliance with the permit condition. The first test will be performed after thirty days from the effective date of this permit during the months of FEB MAY AUG NOV Effluent sampling for this testing shall be performed at the NPDES permitted final effluent discharge below all treatment processes. All toxicity testing results required as part of this permit condition will be entered on the Effluent Discharge Monitoring Form (MR-1) for the month in which it was performed, using the parameter code TGP3B. Additionally, DEM Form AT-1 (original) is to be sent to the following address: Attention: Environmental Sciences Branch North Carolina Division of Environmental Management 4401 Reedy Creek Road Raleigh, N.C. 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 single quarterly monitoring indicate a failure to meet specified limits, then monthly monitoring will begin immediately until such time that a single test is passed. Upon passing, this monthly test requirement will revert to quarterly in the months specified above. 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 95 (min. release) cfs Permitted Flow 5 _ MGD IWC 8_ % Basin & Sub -basin CTB34 Receiving Stream Catawba River County Gaston 6Falte ommended by: t8/26/93 QCL P/F Version 9191 / f /� - x 7Y 6,6 I'le A� Ac ;P71 Ile 172- f I . �'`�a•v �•, �.� ,pN�Jm_,,.'i- w � ��,.y, , r� �-�-:_ �Q - /r�P1.+�J- Sr-�- ...�Gr�Ch� i� F� � C.!„�. /'J�4Isa�... Y� f.�»a"��. t✓.. 'f ! � �it/ C%U �f t.v ti 1/ 08/25/93 T 0 X I C S R E V I E W Facility: CITY OF BELMONT NPDES Permit No.: NC0021181 Status (E, P, or M) : E Permitted Flow: 5.0 mgd Actual Average Flow: 3.7 mgd Subbasin: '030834 Receiving Stream: CATAWBA (LAKE WYLIE)I--------- PRETREATMENT DATA -------------- I ---- EFLLUENT DATA---- I Stream Classification: WSIII&B I ACTUAL PERMITTEDI I 7Q10: 95.0 cfs I Ind. +. Ind. + I FREQUENCY I IWC: 7.54 % I Domestic PERMITTED Domestic I OBSERVED of Chronicl Stn'd / Bkg I Removal Domestic Act.Ind. Total Industrial Total I Eflluent Criteria I Pollutant AL Cone. I Eff. Load Load Load Load Load I Cone. Violations) (ug/1) (ug/1) I 8 (#/d) (#/d) (#/d) (#/d) (#/d) I (ug/1) (#vio/#sam)I --------- ------------------ I -------- -------- -------- -------- --------- -------- I ----------------- I Cadmium S 2.0 I 92% 0.0 0.0 0.01 0.0 0.010 I 2.0 Chromium S 50.0 I 76% 0.2 0.2 0.41 23.0 23.180 i Ls+-� I I Copper AL 7.0 I 82% 0.2 2.2 2.41 1.1 1.320 I 250.0 I N Nickel S 88.0 I 32% 0.1 C.0 0.12 0.8 0.900 I 30.0 I P Lead S 25.0 81% 0.2 0.1 0.28 2.0 2.170 I 20.0 I U Zinc AL 50.0 I 77% 0.7 2.2 2.86 2.2 2.870 I 122.0 T Cyanide S 5.0 I 59% 0.2 0.3 0.48 1.9 2.020 i 0.0 Mercury S 0.012 86% 0.0 0.0 0.00 0.0 0.021 ( u.0 I S Silver AL 0.06 i 94% 0.0 0.3 0.28 0.0 0.020 1 -0.0 I E Selenium S 5.00 0-% I I C Arsenic S 50.00 I 40% 0.0 0.0 0.01 0.0 0.010 I T Phenols S NA I 0% I I I NH3-N C I 0% I 1 0 T.R.Chlor.AL 17.0 I 0% I I N I I I I I I I I I --------------- ALLOWABLE PRDCT'D PRDCT'D PRDCT'D--------- MONITOR/LIMIT --------- 1--ADTN'L RECMMDTN'S-- I Effluent Effluent Effluent Instream I Recomm'd I Cone. using using Cone. Based on Based on Based on I FREQUENCY INSTREAM I I Allowable CHRONIC ACTUAL PERMIT using ACTUAL PERMITTED OBSERVED I Eff. Mon. Monitor. ) Pollutant i Load Criteria Influent Influent OBSERVED Influent Influent Effluent I based on Recomm'd ? I (#/d) (ug/1) (ug/1) (ug/1) (ug/1) Loading Loading Data I OBSERVED (YES/NO) I --------- ---------------------------------------------------------------------I----------------- I Cadmium S I 13.58 26.516 0.027 0.026 0.15 Monitor I NCAC NO I A Chromium S I 113.13 662.903 3.187 180.176 0.00 Li I NCAC NO I N Copper AL I 21.12 92.806 14.050 7.695 18.86 Monitor Monitor Monitor ) Weekly YES I A Nickel S I 70.27 1166.710 2.533 19.821 2.26 Monitor Monitor 1 NCAC NO I L Lead S I 71.45 331.452 1.748 13.353 1.51 Monitor Monitor I NCAC NO I Y Zinc AL 118.05 662.903 21.304 21.379 9.20 Monitor Monitor Monitor I Monthly NO I s Cyanide S I 6.62 66.290. 6.374 26.823 0.00 Monitor Li I NCAC NO I I Mercury S I 0.05 0.159 0.005 0.096 0.00 Monitor Limit I NCAC NO I S Silver AL I 0.54 0.795 0.544 0.039 0.00 Monitor Monitor I Monthly NO i Selenium S I 2.72 66.290 0.000 0.000 0.00 I I R Arsenic S 45.25 662.903 0.194 0.194 0.00 1 I E Phenols S I 0.000 0.000 0.000 0.00 I I S NH3-N C I 0.000 0.00 I I U T.R.Chlor.AL I 225.387 0.00 I I L I I T Ain't /zee,� A!A C, IJ D 0� 2, Z- _ _ z �_� __ _Ni Ceti qq 6. NPDFS PREIRFATmmr INFoRMTI(W RDQ(L 1�,— " r MIIJW NAME: NPDF.S No. NCO 0 c� r WESTER: °= ce ' Rnclacv: _ �� r , L r f PERMIT CONDITICNS SING P12-M..ATN1 2" r 1 � This facility has no SIUs and ' i This facility should and/or is should not have pretreatment 1 i Please include the following developing Pretreatment language. ng cOnditions: program. + r + i Program Development i Phase I due rase + 'IAdditionaidue -r� i �,� This facility is cvrrentl (attached) �T�ltioris i Please include the rr currently implementing.a pretreatment Program. + n9 conditions. + r + Program r �4 Additional Conditions Conditions (attached) i 1 SI(WIFICANT pMSTRIAL U r i r SFAS (Sills) CbNTRIAtTrIONS i SIU FUN - TOTAL: + ! ' - CU4MITICN: TEXTILE: MF'-'I'AL FINISHING: MGD OTHER: MSD ---------------------------- 1 1 1 1 rG 1 1 i�Ds nRrc� RWIEW + i PARA r LOAD IN r i Cd 11.95 rAl�AwBLE DDS'1TCOB15�I'I'IED �c-r�RWe jnoyllL i ' O , 0 6, . Co.Bq ' Zn 0, ? �.b �� lO.ib 3 2 ✓ r 4 r r Phenol =� r i other p•" 00 0 8 f I i RECEIVED: REVIEWED BY: 1 s 08/10/93 T O X I C S R E V I E W Facility: CITY OF BELMONT r7 NPDES Permit No.: NCO021181 Status (E, P, or M): E 7 a(%7S �ppLJ Permitted Flow: 5.0 mgd 2 SGTJ Actual Average Flow: 3.7 mgd Subbasin: '030834 Receiving Stream: CATAWBA (LAKE WYLIE)l--------- PRETREATMENT DATA -------------- I ---- EFLLUENT DATA---- I Stream Classification: WSIII&B ACTUAL PERMITTEDI I 7Q10: 31.0 cfs i Ind. + Ind. + I FREQUENCY I IWC: 20.00 I Domestic PERMITTED Domestic I OBSERVED of Chronicl Stn'd / Bkg I Removal Domestic Act.Ind. Total Industrial Total I Eflluent Criteria I Pollutant AL Cone. I Eff. Load Load Load Load Load I Cone. Violationsl --------- -- (ug/1) (ug/1) ---------------- I % I -------- (#/d) -------- (#/d) -------- (#/d) -------- (#/d) (#/d) I (ug/1) (#vio/#sam)I Cadmium S 2.0 I 92% 0.0 0.1 0.15 --------- 0.1 -------- I 0.090 I -------- 2.0 --------- I 1 Chromium S 50.0 I 76% 0.2 1.1 1.27 15.1 15.280 I 0.0 I I Copper AL 7.0 I 82% 0.2 3.8 4.06 1.0 1.250 I 250.0 1 N Nickel S 88.0 1 32% 0.1 0.9 0.97 0.9 0.930 30.0 I P Lead S 25.0 1 81% 0.2 0.8 0.95 2.0 2.230 I 20.0 1 U Zinc AL 50.0 I 77% 0.7 2.4 3.03 6.1 6.790 I 122.0 I T Cyanide S 5.0 I 59% 0.2 0.9 1.04 1.9 2.080 1 0.0 I Mercury S 0.012 I 86%- 0.0 0.0 0.02 0.0 0.021 I 0.0 I S Silver AL 0.06 I 94% 0.0 0.5 0.55 0.1 0.160 I 0.0 I E Selenium S 5.00 I 0% I I C Arsenic S 50.00 40% 0.0 0.0 0.01 0.0 0.010 I I T Phenols S NA I 08 I I I NH3-N C I 0% I 10 T.R.Chlor.AL 17.0 I 08 I I I 1 N I I--------------- I I ALLOWABLE PRDCT'D PRDCT'D PRDCT'D--------- I I MONITOR/LIMIT --------- I I 1--ADTN'L RECMMDTN'S-- I Effluent Effluent Effluent Instream I Recomm'd 1 Cone. using using Cone. Based on Based on Based on I FREQUENCY INSTREAM I Allowable CHRONIC ACTUAL PERMIT using ACTUAL PERMITTED OBSERVED I Eff. Mon. Monitor. I Pollutant i Load Criteria Influent Influent OBSERVED Influent Influent Effluent I based on Recomm'd ? I --------- -- I (#/d) --------- (ug/1) ----------------- (ug/1) (ug/1) (ug/1) Loading Loading Data 1 OBSERVED (YES/NO) I Cadmium S I 4.95 10.000 0.389 -------- 0.233 -------- 0.40 -------- Monitor -------- Monitor ---------I Limit I ----------------- I NCAC NO I A Chromium S I 41.25 250.000 9.872 118.770 0.00 Monitor Limit I NCAC NO I N Copper AL I 7.70 35.000 23.668 7.287 50.00 Monitor Monitor Monitor I Weekly YES I A Nickel S I 25.62 440.000 21.363 20.482 6.00 Monitor Monitor Monitor I NCAC NO I L Lead S I 26.05 125.000 5.846 13.722 4.00 Monitor Limit Limit I NCAC NO I Y Zinc AL 43.04 250.000 22.571 50.579 24.40 Monitor Monitor Monitor I Monthly NO I S Cyanide S I 2.41 25.000 13.810 27.620 0.00 Limit Limit 1 NCAC NO j I Mercury S I 0.02 0.060 0.096 0.096 0.00 Limit Limit I NCAC NO i S Silver AL I 0.20 0.300 1.069 0.311 0.00 Monitor Monitor I Monthly NO I Selenium S I 0.99 25.000 0.000 0.000 0.00 I R Arsenic S 16.50 250.000 0.194 0.194 0.00 I I E Phenols S I 0.000 0.000 0.000 0.00 I I S NH3-N C I 0.000 0.00 I I U T.R.Chlor.AL I 85.000 0.00 I I L I I I T I I I S I 05/26/93 T O X I C S R E V I E W Facility: CITY OF BELMONT NPDES Permit No.: NC0021181 Status (E, P, or M) : E Permitted Flow: 5.0 mgd Actual Average Flow: 3.7 mgd Subbasin: '030834 Receiving Stream: CATAWBA (LAKE WYLIE)1--------- PRETREATMENT DATA -------------- I ---- EFLLUENT DATA---- I Stream Classification: WSIIISB I ACTUAL PERMITTED[ I 7010: 95.0 cfs I Ind. + Ind. + I FREQUENCY I IWC: 7.54 % I Domestic PERMITTED Domestic I OBSERVED of Chronicl Stn'd / Bkg I Removal Domestic Act.Ind. Total Industrial Total I Eflluent Criteria I Pollutant AL Cone. I Eff. Load Load Load Load Load I Cone. Violationsl (ug/1) (ug/1) I % (#/d) (#/d) (#/d) (#/d) (#/d) I (ug/1) (#vio/#sam)l --------- Cadmium -- S -------- 2.0 -------- I -------- I 92% -------- 0.0 -------- 0.1 -------- 0.15 --------- 0.1 -------- I 0.090 I -------- 2.0 --------= I I Chromium S 50.0 I 7696 0.2 1.1 1.27 15.1 15.280 I 0.0 l I Copper AL 7.0 I 82% 0.2 3.8 4.06 1.0 1.250 I 200.0 I N Nickel S 88.0 I 32% 0.1 0.9 0.97 0.9 0.930 I 60.0 - I P Lead S 25.0 81-% 0.2 0.8 0.95 2.0 2.230 I 30.0 I U Zinc AL 50.0 I 77% 0.7 2.4 3.03 6.1 6.790 I 100.0 I T Cyanide S 5.0 I 59% 0.2 0.9 1.04 1.9 2.080 I 0.0 1 Mercury S 0.012 I 86% 0.0 0.0 0.02 0.0 0.021 I 0.0 I S Silver AL 0.06 I 94% 0.0 0.5 0.55 0.1 0.160 I 0.0 l E Selenium S 5.00 I 0%. I I C Arsenic S 50.00 1 40% 0.0 0.0 0.01 0.0 0.010 I I T Phenols S NA 0-% I I I NH3-N C I 0% I 1 0 T.R.Chlor.AL 17.0 I 0% I I I I N I --------------- I I ALLOWABLE PRDCT'D PRDCT'D I I PRDCT'D--------- MONITOR/LIMIT ---- =---- I I 1--ADTN'L RECMMDTN'S-- I I Effluent Effluent Effluent Instream I Recomm'd I 1 Cone. using using Cone. Based on Based on Based on I FREQUENCY INSTREAM I I Allowable CHRONIC ACTUAL PERMIT using ACTUAL PERMITTED OBSERVED 1 Eff. Mon. Monitor, l Pollutant I Load Criteria Influent Influent OBSERVED Influent Influent Effluent I based on Recomm'd 7 I I (#/d) (ug/1) --------- (ug/1) (ug/1) -------- (ug/1) -------- Loading -------- Loading -------- Data ---------I I OBSERVED (YES/NO) I ----------------- I --------- Cadmium -- S I I --------- 13.58 -------- 26.516 0.389 0.233 0.15 Monitor Monitor I NCAC NO I A Chromium S 113.13 662.903 9.872 118.770 0.00 Monitor Limit I NCAC NO 1 N Copper AL I 21.12 92.806 23.668 7.287 15.09 Monitor Monitor Monitor I Weekly YES I A Nickel S 70.27 1166.710 21.363 20.482 4.53 Monitor Monitor Monitor I NCAC NO 1 L Lead S I 71.45 331.452 5.846 13.722 2.26 Monitor Monitor Monitor 1 NCAC NO I Y Zinc AL 1 118.05 662.903 22.571 50.579 7.54 Monitor Monitor Monitor ( Monthly NO I S Cyanide S I 6.62 66.290 13.810 27.620 0.00 Limit Limit 1 NCAC NO ( I Mercury S I 0.05 0.159 0.096 0.096 0.00 Limit Limit I NCAC NO 1 S Silver AL I 0.54 0.795 1.069 0.311 0.00 Monitor Monitor I Monthly NO I Selenium S I 2.72 66.290 0.000 0.000 0.00 I I R Arsenic S I 45.25 662.903 0.194 0.194 0.00 I I E Phenols S 0.000 0.000 0.000 0.00 I I S NH3-N C I 0.000 0.00 l l U T.R.Chlor.AL I 225.387 0.00 I I L I I I T I I I I I S I ,t 08/10/93 Facility: CITY OF BELMONT NPDES Permit No.: NCO021181 Status (E, P, or M) : E Permitted Flow: 5.0 mgd Actual Average Flow: 3.7 mgd Subbasin: 1030834 Receiving Stream: CATAWBA (LAKE WYLIE)I------- Stream Classification: WSIII&B I 7Q10: 15.5 cfs 1 IWC: 33.33 % I Stn'd / Bkg ( Removal Domestic Act.Ind Pollutant AL Conc. Eff. Load Load (ug/1) (ug/1) 1 % (#/d) (#/d) --------- ------------------ I -------- -------- ------- Cadmium S 2.0 1 92% 0.0 0.1 Chromium S 50.0 I 76% 0.2 1.1 Copper AL 7.0 I 82% 0.2 3.8 Nickel S 88.0 1 32% 0.1 0.9 Lead S 25.0 I 81% 0.2 0.8 Zinc AL 50.0 1 77% 0.7 2.4 Cyanide S 5.0 I 59% 0.2 0.9 Mercury S 0.012 1 86% 0.0 0.0 Silver AL 0.06 I 94% 0.0 0.5 Selenium S 5.00 ( 0% Arsenic S 50.00 40% 0.0 0.0 Phenols S NA I 0% NH3-N C I 0% T.R.Chlor.AL 17.0 I 0% I I I (--------------- ALLOWABLE PRDCT'D PRDCT'D 1 Effluent Effluent Effluent I Conc. using using I Allowable CHRONIC ACTUAL PERMIT Pollutant Load Criteria Influent Influent I (#/d) (ug/1) (ug/1) (ug/1) --------- -- I --------- -------- --------- -------- Cadmium S ( 2.86 6.000 0.389 0.233 Chromium S I 23.84 150.000 9.872 118.770 Copper AL I 4.45 21.000 23.668 7.287 Nickel S 1 14.81 264.000 21.363 20.482 Lead S I 15.06 75.000 5.846 13.722 Zinc AL ( 24.88 150.000 22.571 50.579 Cyanide S I 1.40 15.000 13.810 27.620 Mercury S I 0.01 0.036 0.096 0.096 Silver AL I 0.11 0.180 1.069 0.311 Selenium S 1 0.57 15.000 0.000 0.000 Arsenic S 9.54 150.000 0.194 0.194 Phenols S 1 0.000 0.000 0.000 NH3-N C I 0.000 T.R.Chlor.AL I 51.000 I I I T O X I C S R E V I E W -79to Q, s SO.ST) (3-1) /s Scts PRETREATMENT DATA -------------- I ---- EFLLUENT DATA ---- ACTUAL PERMITTED( 1 Ind. + Ind. + I FREQUENCY I Domestic PERMITTED Domestic I OBSERVED of Chronicl Total Industrial Total I Eflluent Criteria I Load Load Load I Conc. Violationsl (#/d) -------- (#/d) (#/d) I (ug/1) (#vio/#sam)l 0.15 --------- 0.1 -------- I 0.090 I -------- 2.0 --------- I 1 1.27 15.1 15.280 i 0.0 I I 4.06 1.0 1.250 I 250.0 1 N 0.97 0.9 0.930 I 30.0 ( P 0.95 2.0 2.230 20.0 I U 3.03 6.1 6.790 1 122.0 ( T 1.04 1.9 2.080 I 0.0 1 0.02 0.0 0.021 I 0.0 1 S 0.55 0.1 0.160 I 0.0 I E 1 I C 0.01 0.0 0.010 I 1 T I I I I I 0 I I I N I PRDCT'D I I --------- MONITOR/LIMIT --------- I I 1--ADTN'L RECMMDTN'S-- I Instream I Recomm'd 1 Conc. Based on Based on Based on I FREQUENCY INSTREAM 1 using ACTUAL PERMITTED OBSERVED I Eff. Mon. Monitor. I OBSERVED Influent Influent Effluent I based on Recomm'd ? 1 (ug/1) Loading Loading Data 1 OBSERVED (YES/NO) 1 -------- 0.67 -------- Monitor -------- Monitor ---------I Limit --------- -------- I 1 NCAC NO 1 A 0.00 Monitor Limit I NCAC NO 1 N 83.33 Monitor Monitor Monitor 1 Weekly YES ( A 10.00 Monitor Monitor Limit NCAC NO I L 6.67 Monitor Limit Limit 1 NCAC NO 1 Y 40.67 Monitor Monitor Monitor I Monthly YES I S 0.00 Limit Limit I NCAC NO 1 I 0.00 Limit Limit 1 NCAC NO I S 0.00 Monitor Monitor 1 Monthly NO I 0.00 1 R 0.00 1 1 E 0.00 I I S 0.00 1 I U 0.00 I I L IT I I IS I