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Home My WebLink AboutNC0084387_Renewal Application_20140924NCDENR North Carolina Department of Environment and Natural Resources Pat McCrory Governor Mr. John C. Huber Charlotte Mecklenburg Utilities Lee S. Duke WTP 7980 Babe Stillwell Farm Rd. Huntersville, NC 28078 Dear Mr. Huber: John E. Skvarla, III Secretary September 29, 2014 Subject: Acknowledgement of Permit Renewal Permit NCO084387 Mecklenburg County The NPDES Unit received your permit renewal application on September 24, 2014. A member of the NPDES Unit will review your application. They will contact you if additional information is required to complete your permit renewal. You should expect to receive a draft permit approximately 30 -45 days before your existing permit expires. If you have any additional questions concerning renewal of the subject permit, please contact Derek Denard (919) 807 -6307. Sincerely, W rre w Tkeo -f&roU Wren Thedford Wastewater Branch cc: Central Files Mooresville Regional Office NPDES Unit 1617 Mail Service Center, Raleigh, North Carolina 27699 -1617 Location: 512 N. Salisbury St. Raleigh, North Carolina 27604 Phone: 919 -807 -63001 Fax: 919 - 807- 64921Customer Service: 1-877-623-6748 Internet:: www.ncwater.org An Equal OpportunitylAffirmafive Action Employer • CHARIA'I'TEw September 1, 2014 Division of Water Resources WQ Permitting Section — NPDES 1617 Mail Service Center Raleigh NC 27699 -1617 Subject: Renewal NPDES Permit # NCO084387 Lee S. Dukes Water Treatment Plant Mecklenburg County WQ Permitting Section, RECEIVED /DENR/DWR SEP 2 4 2014 Water Quallty Permitting Section In accordance with our permit we are requesting renewal prior to our expiration date of February 28, 2015. Enclosed is our NPDES Permit Applications Short Form C for the renewal of NCO084387 for the Lee S. Dukes Water Treatment Plant Also attached to the Short Form C are: • Response for describing the treatment process for raw water ( #7) • Response for wastewater and treated process for wastewater generated by the facility ( #8) • Solids Handling Plan • Plant Flow Schematic • Outfall /discharge location If you have any questions, please contact me at 704 - 399 -2426 extension 222 or Randy Hawkins at 704- 201 -8344. Sincerely, C John C. Hu er Chief of Operations City of Charlotte Charlotte - Mecklenburg Utility Department CHARLOTTE - MECKLENBURG UTILITIES Water Treatment Division 5200 Brookshire Boulevard Charlotte, NC 28216 PH: 704/399 -2426 FAX: 704/393 -9163 NPDES PERMIT APPLICATION - SHORT FORM C - WTP For discharges associated with water treatment plants Mail the complete application to: N. C. Department of Environment and Natural Resources RECEIVEDIDENRIDWR Division of Water Quality / NPDES Unit 1617 Mail Service Center, Raleigh, NC 27699 -1617 S EP 2 4 2014 NPDES Permit Number NCH Water Quality 7 permitting If you are completing this form in computer use the TAB key or the up - down arrows to move from one field to the next. To check the boxes, click your mouse on top of the box. Otherwise, please print or type. 1. Contact Information: Owner Name Charl ottP MPekl Pnh ura U t i l i t i e s Facility Name Lee S Duke WTP Mailing Address 7980 Babe Stillwell Farm Road City Huntersville State / Zip Code North Carolina 28078 Telephone Number ( 704 9 4 8 - 6 9 5 4 Fax Number (704 ) 948 -7581 e -mail Address dhaniok(doi- charlotte -ne -us 2. Location of facility producing discharge: Check here if same as above Street Address or State Road City State / Zip Code County 3. Operator Information: Name of the firm, consultant or other entity that operates the facility. (Note that this is not referring to the Operator in Responsible Charge or ORC) Name City of Charlotte Mailing Address 5200 Brookshire Blvd City Charlotte State / Zip Code N.C. 2 8 21 6 Telephone Number (7 0 4) 399-2426 Fax Number (704) 393-9163 4. Ownership Status: Federal ❑ State ❑ Private ❑ Public] Page 1 of 3 Version 5/2012 NPDES PERMIT APPLICATION - SHORT FORM C - WTP For discharges associated with water treatment plants S. Type of treatment plant: Conventional (Includes coagulation, flocculation, and sedimentation, usually followed by filtration and disinfection) ❑ Ion Exchange (Sodium Cycle Cationic ion exchange) ❑ Green Sand Filter (No sodium recharge) ❑ Membrane Technology (RO, nanofiltration) Check here if the treatment process also uses a water softener ❑ 6. Description of source water(s) (i.e. groundwater, surface water) 7. Describe the treatment process(es) for the raw water: See Attached 8. Describe the wastewater and the treatment process(es) for wastewater generated by the facility: See Attached 9. Number of separate discharge points: 1 Outfall Identification number(s) () () 1 10. Frequency of discharge: Continuous ❑ Intermittent If intermittent: Days per week discharge occurs: 7 Duration: Approximately 4hrs /day 11. Plant design potable flowrate2 5 . 31 MGD Backwash or reject flow .197 MGD 12. Name of receiving stream(s) (Provide a map showing the exact location of each outfall, including latitude and longitude): McDowell Creek 13. Please list all water treatment additives, including cleaning chemicals or disinfection treatments, that have the potential to be discharged. Alum / aluminum sulfate Ye No Page 2 of 3 Version 5/2012 NPDES PERMIT APPLICATION - SHORT FORM C - WTP For discharges associated with water treatment plants Iron sulfate / ferrous sulfate Yes 6 Fluoride Yes No Ammonia nitrogen / Chloramines Yes ®o Zinc - orthophosphate or sweetwater CP1236 Yes List any other additives below: RECEIVED/DENRIDWR Chlorine, Carbon, KMN04, Lime, Liquid Linear SEP 2 4 2014 Phosphate, Sodium Bisulfite Water Quality vArmlltina Mon 14. Is this facility located on Indian country? (check one) Yes ❑ No FXI 15. Additional Information: Provide a schematic of flow through the facility, include flow volumes at all points in the water treatment process. The plan should show the points] of addition for chemicals and all discharges routed to an outfall [including stormwater]. Solids Handling Plan Please see Attached 16. NEW Applicants Information needed in addition to items 1 -15: New applicants are highly encouraged to contact a permit coordinator with the NCDENR Customer Service Center. Was the Customer Service Center contacted? ❑ Yes ❑ No Analyses of source water collected Engineering Alternative Analysis Discharges from Ion Exchange and Reverse Osmosis plants shall be evaluated using a water quality model. 17. Applicant Certification I certify that I am familiar with the information contained in the application and that to the best of my knowledge and belief such information is true, complete, and accurate. ohn C. Huber of Applicant Chief of Operations Title 9/1/14 Date 19orth Carolina General Statute 143 -215.6 (b)(2) provides that: Any person who knowingly makes any false statement representation, or certification in any application, record, report, plan, or other document files or required to be maintained under Article 21 or regulations of the Environmental Management Commission implementing that Article, or who falsifies, tampers with, or knowingly renders inaccurate any recording or monitoring device or method required to be operated or maintained under Article 21 or regulations of the Environmental Management Commission implementing that Article, shall be guilty of a misdemeanor punishable by a fine not to exceed $25,000, or by imprisonment not to exceed six months, or by both. (18 U.S.C. Section 1001 provides a punishment by a fine of not more than $25,000 or imprisonment not more than 5 years, or both, for a similar offense.) Page 3 of 3 Version 5/2012 7. Describe the treatment processes for the raw water. Raw water is treated with potassium permanganate and carbon as needed. Aluminum sulfate is added at the head works of the plant. The raw water then passes through three stages of flocculation before entering the sedimentation basins. Chlorine is added just before filtration. Raw water is then filtered and lime and chlorine are added. The water is then dosed with additional chlorine and sent to the clearwells. 8. Describe the wastewater and the treatment processes for wastewater generated by the facility. Solids are generated from the water treatment process and consist mostly of alum sludge. Solids generated from the sedimentation basins are discharged thru a gravity thickener and then discharged to a holding lagoon. Solids generated from filter backwashes are discharged to an EQ basin. The solids from the EQ basin are sent to a clarifier. The solids are then sent to the thickener and then to the holding lagoon. Clarified water goes over the weir of the clarifier, through a de- chlorination chamber to the NPDES discharge point. Solids from the holding lagoon are removed and land applied in accordance with our land application permit. Solids Plan 1. Solids generated from the sedimentation basins are discharged thru a gravity thickener and then discharged to a holding lagoon. 2. Solids generated from filter backwashes are discharged to an EQ basin. The solids from the EQ basin are sent to a clarifier. The solids are then sent to the thickener and then to the holding lagoon. Clarified water goes over the weir of the clarifier, through a de- chlorination chamber to the NPDES discharge point 001. 3. Solids from the holding lagoon are removed and land applied by a contractor to be land applied as a liquid. We also have the ability to tanker the liquid to a belt press for pressing then land applied or taken to a land fill. 4. The contractor must follow the permit # W.Q. 0000057 for solids disposal. Lake Norman Lee S. Dukes Water Treatment Plant Process Flow Diagram as of 28 January 2011 N M 0 M v FT-1 C 10 M a m CD aZF 0 �' 'p Carbon Alum Chlorine P KMnOr ClJodn Chlorin Flouride Lime Cleanvel 1 9 MG Sedimentation Filter East Module 1 East Module 1 _ Finished Clea wall Z High Sery ice To 978 Walter pump Station Zone WrH/ au j—low Sedimentation Filter /R z �, 3 d East Module 2 East Module 2 V ,n g Clearwell 3 9 MG r %�� r uu Backwash Waller Sodium BisulAle s I •- Polymer Sed Basin Residuals Clarifier EQ Effluent DechlorinaUOn Basin Clarifier Contact To Creek Chamber Solids .�j /�'� mR� I,.il s� Thickened Residual. 3, m Thickener Lagoon N M 0 M v FT-1 C 10 M a m CD aZF 0 �' 'p Qh =s: Fl 5NW LaawAi -- 35*25 4 y. Lo4rude: 31*53'1 -1 Scrim Chss: W5-T%; CA $ubbasin: 30533 Recali-mg Smom: MCDOWd CrCa NCO084387 CMUD /North bfcj 6 �s Facility Location ,r No,th SCALE 1:24000