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Home My WebLink AboutNC0030210_Permit Modification_19980615WDES DOCYNENT SCANNIM6 COVER SHEET NPDES Permit: NC0030210 Charlotte / Mallard Creek WWTP Document Type: Permit Issuance Wasteload Allocation Authorization to Construct (AtC) Permit Modification Complete File - Historical Engineering Alternatives (EAA) Correspondence Instream Assessment (67b) Speculative Limits Environmental Assessment (EA) Document Date: June 15, 1998 This document is printed on reuse paper - ignore zuzy coateat o w the reverse side State of North Carolina Department of Environment and Natural Resources Division of Water Quality James B. Hunt, Jr., Governor Wayne McDevitt, Secretary A. Preston Howard, Jr., P.E., Director Mr. Barry Gullet, Deputy Director Charlotte -Mecklenburg Utility Department 5100 Brookshire Boulevard Charlotte, North Carolina 28216 Dear Mr. Gullet: No I D E N R June 15, 1998 Subject:NPDES Permits Modifications Permit No. NCO024937 Sugar Creek WWTP Permit No. NCO024945 Irwin Creek WWTP Permit No. NCO024970 McAlpine Creek WWTP Permit No. NCO030210 Mallard Creek WWTP Mecklenburg County The Division of Water Quality received your request for permit modifications on June 1, 1998 for the above referenced facilities. The permits have been modified per your written request for NPDES permit modification and modification fee (check #634351, $300). Three minor corrections were also made to Permit No. NC0030210. The following are the listed changes made to each permit: Permit No. NC0024937, Sugar Creek WWTP • The daily maximum requirement for Total Residual Chlorine was changed to a daily average requirement of 28 µg/1 with a weekly average of 19 µg/l. Permit No. NC0024945, Irwin Creek WWTP • The daily maximum requirement for Total Residual Chlorine was changed to a daily average requirement of 28 µg/1 with a weekly average of 21 µg/l. Permit No. NC0024970, McAlpine Creek WWTP • The daily maximum requirement for Total Residual Chlorine was changed to a daily average requirement of 28 µg/l with a weekly average of 17 µg/l. • The Chronic Toxicity (Ceriodaphnia) P/F at 90% test was changed to a Chronic Toxicity (Phase II) at 90% test. As was stated on the permit issuance letter for NC0030210, dated April 27, 1998, "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." If the facility performs a quarterly single concentration test at 90% that fails, multiple concentration tests must be run in the consecutive months of the quarter and the arithmetic average of values will be used to determine if the chronic limit is met. Permit No. NC0030210, Mallard Creek WWTP • The following statement was mistakenly added to the permit issuance letter, dated April 27, 1998. "Added weekly Chromium testing, limited at 53.0 µg/l." Monitoring only is required for Chromium. P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone 919-733-5083 FAX 919-733-0719 An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper NPDES Permit Modifications Charlotte -Mecklenburg Utility Department June 15, 1998 Page 2 The following language was added as footnote 6 to effluent pages A., B., and C. The detection limit for mercury is 0.2 µg/l. If the measured levels of mercury are below the detection limit, then the measurement is considered to be zero for purposes of compliance evaluation and should be reported on the DMR as < 0.2 µg/1. Conductivity measurement was inadvertently added to the outfall 001 effluent discharge. This has been removed. Total Residual Chlorine monitoring was inadvertently removed from the outfall 002 effluent discharge. It has been added back, although it is still only required if chlorine disinfection is used. Please find enclosed amended effluent sheets which should be inserted into the respective permits. The old effluent pages should be discarded. All other terms and conditions contained in the original permit remain unchanged and in full effect. This permit modification is issued pursuant to the requirements of North Carolina General Statutes 143-215.1 and the Memorandum of Agreement between North Carolina and the U. S. Environmental Protection Agency. If any parts, measurement frequencies or sampling requirements contained in this permit modification are unacceptable to you, you have the right to an adjudicatory hearing upon written request within thirty' (30) days following receipt of this letter. This request must be in the form of a written petition, conforming to Chapter 150B of the North Carolina General Statutes, and filed with the office of Administrative Hearings, Post Office Drawer 27447, Raleigh, North Carolina 27611-7447. Unless such a demand is made, this permit modification shall be final and binding. If you have any questions, please contact Mary Cabe of my staff at (919) 733-5083, extension 518. Sincerely, 11V Preston Howard, Jr., P.E. Attachments cc: NPDES Unit Point Source Compliance / Enforcement Unit Central Files Mooresville Regional Office, Water Quality Section Technical Assistance & Certification Unit Aquatic Toxicology Unit Mr. J. Reed Atkinson / CMUD A. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL Permit No. NCO030210 During the period beginning on the effective date of the permit and lasting UNTIL EXPANSION ABOVE 6.0 MGD or expiration, the Permittee is authorized to discharge from outfall serial number 001. Such discharges shall be limited and monitored by the Permittee as specified below: ,a t . [� .� ..• ,R & :.{.+' } . `r ,sue • .^ Y. i '. hiAF.Cy `: f ,r - tip • . e'r 2`x��.. ' •F3. .r f. , •� :�}✓ k Su c• �+,' jw +�.t'k,u;.!:a.5.•�k?b+ _ i;f j�,��.}�r ��ss tyy�v;.4 j .:. , _g S3�.`L1=;I. �y '7 ,, ..�$.. o; p tiro 4atF r '':i! �n .� Y rAvera e . : w, .r., ..t. i ee �4"'' • �. :.t: �TiT: ,- -Hera a u' •a: a;. 3C.'�: i .1�.� a • Maximum., r . +a f r easuremen Y.•'i 'Y� �� Fre ue;. i am e,Sample. :.h �c.Sr SIivy' `. .:.` a¢ °W Continuous Recording I or £BOD, 5 day, 20°C-(April-1 = October 3-1) - -- .- -m . -m — - —Da y Composite— - - CBOD, 5 day, 20°C (Nov. l - March 31) m m Daily omposrte , Total Suspended Residue m m aiy omposrte E, 3 as pry I I - October 3 1) 2.0 m aiy omposrte 3 as (November - arc m Daily composite Dissolved Oxygen ai y ra , Fecal o f orm geometric mean ml 40U 100 ml Daily ra Total Residual Chlorine4 Daily Urab Total itrogen 2 + NO3 + Monthly ComposiFe— l'otal Phosphorus Monthly Composite Chronic Toxicity5 Quarterly Composite emperature, ai yGrab , Conductivity Urab U, Cadmium 2.1 µ Weekly Composite Lead —TrUT911 Weekly Composite Mercury µ ee yComposite Cyanide ont ra romium 2/Mon-tH Composite Arsenic ontcomposite Nickel 2/Month Composite Copper2/Month Composite inc ont omposrte i ver ont omposit Notes: Sample locations: E - Effluent, I - influent, U - Upstream at least 200 feet above the discharge point, D - Downstream at NCSR 1300 AND at NCSR 1304 (Rocky River). Instream samples shall be grab samples and collected 3/week during the months of June through September and once per week during the remaining months of the year. 2 The monthly average effluent CB0D5 and Total Suspended Residue concentrations shall not exceed 15% of the respective influent value (85% removal). 3 The daily average dissolved oxygen effluent concentration shall no be less than 6.0 mg/I. 4 Total Residual Chlorine monitoring is only required when chlorine is used in the disinfection process. 5 Chronic Toxicity (Phase II) at 90%; February, May, August, and November. See Supplement to Effluent Limitations, Condition E. 6 The detection limit for mercury is 0.2 µg/l. If the measured levels of mercury are below the detection limit, then the measurement is considered to be zero for purposes of compliance evaluation and should be reported on the DMR as < 0.2 µg/1. . - The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored daily at the effluent by grab. sample. There shall be no discharge of floating solids or visible foam in other than trace amounts. Special permit conditions applicable to the subject facility are listed on the Supplement to Effluent Limitations and Monitoring Requirements - Special Conditions page. B. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL IPermit No. NC0030210 During the period beginning UPON EXPANSION ABOVE 6.0 MGD and lasting until expansion or expiration, the Permittee is authorized to discharge from outfall serial number 001. Such discharges shall be limited and monitored by the Permittee as specified below: ' e •t {i' 'A?'as �t� .. . 1 .• � w 'A: y, .. . elks-3Wi.KSI.".�':'RFk on .•y.pVc.a.:y/ � _ � ry:. ;t � A :i }l .i rtj i%; �P.t !�^iIK�IT..�+�. v�..-,�� .. ° i -' � ;�. ee , . r. a z #:}. ..z .' - delve age Maxiy m ;�,F 'el. '[,x- .i" �'iFaA.�as��$�. � 4 ne. �_ .� -r � ra Measure s:' am P �: r��►' a e , p�• � oca tan; Flow Continuous Recording or CBOD, 5 day, 20°C (April 1 - October 31) m m ai y ompostte , CBOD, 5 day, 200C (Nov. 1 - March 31) m m Daily Composite , Total Suspended Residue m m Daily Composite , 3 as pry - October m ai y Composite 3 as (November - arc m Daily ompostte Dissolved Oxygen DailyGrab , Fecal o orm geometric mean m ml DailyGrab , Total Residual Chlorine4 Daily Urab Total Nitrogen 2 + NO3 + Monthly omposrte Total Phosphorus Monthly Composite Chronic Toxicity5 Quarterly Composite Temperature, 11C Daily Grab Conductivity Urab Cadmium. 2.1 µ ee y ompostte Lead µ Weekly- Composite Mercury µ Weekly Composite Cyanide 2/Month Chromium ontComposite -E- Arsenic2/Month Composite Nickel on ompostte Copper 2/Month Composite Zinc2/Mont Composite Silver El 2/Month Composite I E J Notes: T—Sample locations: E - Effluent, I - Influent, U - Upstream at least 200 feet above the discharge point, D - Downstream at NCSR 1300 AND at NCSR 1304 (Rocky River). Instream samples shall be grab samples and collected 3/week during the months of June through September and once per week during the remaining months of the year. 2 The monthly average effluent CBOD5 and Total Suspended Residue concentrations shall not exceed 15% of the respective influent value (85% removal), 3 The daily average dissolved oxygen effluent concentration shall no be less than 6.0 mg/l. 4 Total Residual Chlorine monitoring is only required when chlorine is used in the disinfection process. 5 - Chronic Toxicity (Phase II) at 90%; February, May, August, and November. See Supplement to Effluent Limitations, Condition E. 6 The detection limit for mercury is 0.2 µg/l. If the measured levels of mercury are below the detection limit, then the measurement is considered to be zero for purposes of compliance evaluation and should be reported on the DMR as < 0.2 µg/1. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored daily at the effluent by grab sample. There shall be no discharge of floating solids or visible foam in other than trace amounts. Special permit conditions applicable to the subject facility are listed on the Supplement to Effluent Limitations and Monitoring Requirements - Special Conditions page. C. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL Permit No. NCO030210 During the period beginning UPON EXPANSION ABOVE 8.0 MGD and lasting until expiration, the Permittee is authorized to discharge from outfall serial number 001. Such discharges shall be limited and monitored by the Permittee as specified below: EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS Monthly Average Weekly Average ai y Maximum measurement Frequency Sample Type Sample Location' ow ontmuous ecor mg I or CBOD, 5 day, 20°C (April 1 - October 31) 4.2 m m airy omposne CBOD, 5 day, 20°C (Nov. 1 - March 31)- m m Daily omposne Total Suspended Residue m m Daily omposne 3 as(April - cto erTIT ---FG—MTT Daily omposne 3 as (November I - March 3 1) 2.0 m Daily omposne Dissolved Oxygen ai y ra Fecal o f orm geometric mean m r— Daily ra Total Residual Chlorine ai y ra otaNitrogen 2 + NO3 + ont y omposne Total Phosphorus ont yComposite Chronic Toxicity uarter y ompos�te emperature, Daily ra on uctrvity Orab Cadmium µ ee y omposne Lead µ ee y omposne Mercury µ ee y omposne Cyanide2/Month ra Chromium ont omposne rsemc ont omposne �c a ontcomposite opper ontComposite me ont omposie Silver2/Month omposne Notes: ample locations: E - Effluent, I - influent, U - Upstream at least 200 feet above the discharge point, D - Downstream at NCSR 1300 AND at NCSR 1304 (Rocky River). • Instream samples shall be grab samples and collected 3/week during the months of June through September and once per week during the remaining months of the year. 2 The monthly average effluent CB0135 and Total Suspended Residue concentrations shall not exceed 15% of the respective influent value (85% removal). 3 The daily average dissolved oxygen effluent concentration shall no be less than 6.0 mg/I. 4 Total Residual Chlorine monitoring is only required when chlorine is used in the disinfection process. 5 Chronic Toxicity (Phase II) at 90%; February, May, August, and November. See Supplement to Effluent Limitations, Condition E. 6 The detection limit for mercury is 0.2 µg/l. If the measured levels of mercury are below the detection limit, then the measurement is considered to be zero for purposes of compliance evaluation and should be reported on the DMR as < 0.2 µg/I. The pH shall not be less than 6.0 standard units nor greater than 9.0 standard units and shall be monitored daily at the effluent by grab sample. There shall be no discharge of floating solids or visible foam in other than trace amounts. Special permit conditions applicable to the subject facility are listed on the Supplement to Effluent Limitations and Monitoring Requirements - Special Conditions page. D. EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS FINAL Permit No. NC0030210 During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is authorized to discharge from outfall serial number 002. Such discharges shall be limited and monitored by the Permittee as specified below: c. . r . ry a r rx [■. *{11a.'+.dd.ii:a f 9''awa'ibhrdxa�+ on y 'Weekly;. �Avera a f. Avera e - Daily- =,�Y. Maximum _.:•w.P«..% easuremen Fi"e e c ,�!l.e = }}4j _ i'r�e:.1 �•33«.'i r e s .. ape �}�.. �.y's..�phRM6P7� a e ati a Flow ontinuous ecor ing or ay, 20uC 8.3 mg m Daily Composite Total Suspended Residue m m Daily omposite 3 as m DailyComposite- Fecal o f onn geometric mean m Daily firab Turbidity 10 NTU Continuou-s Rcording Total Residual Chlorine2 Continuous Recording ont yGrab E JUS Monthly Urab —Monthly Urab Chloride Monthly Orab Notes: 1 Sample locations: E - Effluent, I — Influent 2 Monitoring required only if chlorine disinfection is employed. See part III, Condition H for additional reuse requirements. Special permit conditions applicable to the subject facility are listed on the Supplement to Effluent Limitations and Monitoring Requirements - Special Conditions page. • -5 300. 60 c/lRF CHARLOTTE_ May 26, 1998 Mary Cabe NC DENR, Div of Water Quality P.O. Box 29535 Raleigh, North Carolina 27626-0535 Subject: Minor Permit Modifications McAlpine Creek NPDES Permit No. NCO024970 Sugar Creek NPDES Permit No. NCO024937 Irwin Creek NPDES Permit No. NCO024945 Dear Mary: I am sending our check for $300.00 for minor modifications to the subject NPDES permits. This is per our conversation last week and stems from our informational request in December 1997. The first modification requested is to change the Total Residual Chlorine (TRC) limit in each of the three permits above from a Daily Maximum to a Daily Average value. Specifically, each plant would have a maximum Daily Average concentration limit of 28ug/l. Sampling would be by the "grab" method, with one or more samples collected daily. The second modification requested is to change the toxicity testing requirement from the Chronic Toxicity (Ceriodaphnia) P/F test to the Chronic Toxicity Phase II test at McAlpine Creek only. We request that the Phase 11 toxicity test language that is in the recently issued Mallard Creek NPDES permit be used, including an explanation as in the Mallard Creek permit cover letter that explains that compliance is determined either by passing the quarterly test, or by passing on the basis of a quarterly arithmetic average of subsequent test values. Please let me know if you have any questions or need additional information. Thank you for your assistance. Sincerely, CHARLOTTE MECKLENBURG UTILITIES S4- BarryyM. ullet, PE Deputy Director cc: Kim Neely, McAlpine Creek ORC Tom Hunter, Irwin Creek ORC Roy Purgason, Sugar Creek ORC Myra Zabec, Lab Manager File Administration Division 5100 Brookshire Boulevard Charlotte, NC 28216 704/399-2221 Charlotte -Mecklenburg Utility Department CMUD - TRC daily avg limit Subject: CMUD - TRC daily avg limit Date: Wed, 20 May 1998 09:00:46 -0500 From: "Kevin Bowden"<kevin_bowden@h2o.enr.state.nc.us> To: mary_cabe@h2o.enr.state.nc.us i Mary, we looked at CMUD's request to have it's daily max TRC limit changed to daily avg. We don't see any major setbacks as a result of this proposed modification. Kevin Bowden �� NC DENR - DM sion of Water Quality Aquatic Toxicology Unit 4401 Reedy Creek Road Raleigh, NC 27607 phone: (919) 733-2136 fax: (919) 733-9959 e-mail: Kevih—Bowden@h2o.enr.state.nc.us 1 of 1 5/20/98 9:30 AM State of North Carolina Department of Environment MAI and Natural Resources All ` • Division of Water Quality - James B. Hunt, Jr., Governor Wayne McDevitt, Secretary E rs i F =1. A. Preston Howard, Jr., P.E., Director �-o. Fax: From: Phone: Fax: Comments: Facsimile Cover Sheet S/s b'dvJ ----------- M Kill, (919) 73MO83 extension S'L$ (919) 733-0719 pages, including this cover sheet l A, (�--V 0- tin �\d Ca/,,-c rrd en no IVA, n t i P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone (919) 733-5063 FAX (919) 733-0719 An Equal opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper • CHARLOTTE. Mr. David Goodrich NC Dept. of Environment and Natural Resources PO Box 29535 Raleigh, NC 27626-0535 Subject: NPDES Permits McAlpine, Creek WWMF NC0024970 Sugar Creek WWTP NC0024937 Irwin Creek WWTP NC0024945 Citv of Charlotte Dear Mr. Goodrich. We appreciate you and Ms. Sullins taking time out of your busy schedules to come to Charlotte to meet with us to learn more about our op tions. I hope that the session was as useful and informative for you as it was for us. One of the issues tb at we discussed was our Total Chlorine Residual limits on our permits. The limits that we presently have is either a Dai. Max limit or includes a Daily Max limit along with a weekly average. The problem that the Daily Max represents is a inability to take check samples to regulate dechlor feed rates. If we take a check sample and even if it is just slightly °I er the Daily Max limit we have to report the number and that one number represents a violation for the month for the parameter. If we had a Daily Average limit instead of a Daily Max, then we could take check samples and adjust dechlor feed rates to meet demand. This would result in a more efficient chemical feed and less residual dechlor chemical going to the receiving steam. The ability to adjust dechlor feed would also increase our reliability in meeting the Total Chlorine Residual limit. In our meeting,, you a uested g. , q information on the methodology and instrumentation we are using to do our chorine residual monitoringf more Please find the requested information attached to this letter. We would like to request that the Daily Max limit for Total Chlorine Residual in the above referenced permits be replaced by a Daily Average limit. Sincerely, . Rem Atkinson cc:Barry Gullet Doug Bean Rex Gleason Kim Neeley Rov Purgason Tom Hunter WAk* 7 Chariotte-Mecklenburg Utilities Wastewater Treatment Division 9 5100 Brookshire Boulevard 9 Charlotte. NC 28216.704/399-2221 McAlpine Creek Laboratory Ultra Low Range Total Residual Chlorine Analysis. � Method: Hach method for the analysis of ultra low levels of total residual chlorine. Instrumentation: Hach DR2000 spectrometer Reagents: ULR chlorine buffer 1.5 ml ampoules. DPD indicator 1.0 ml ampoules. Standard: Hach chlorine solution ampoules. (50 — 75 mg/1) Operating ran e: 5 ug/1(± 20%) —150 ug/1(± 10%). Higher concentration ate obtained by dilution or by using a DR100 measurement device.