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Home My WebLink AboutNC0083071_Renewal Application_20171017WarerResources ENVRONMENTAL QUALITY October 17, 2017 Steve Hooper Town of Robbinsville 4 Court St Robbinsville, NC 28771-0129 Subject: Permit Renewal Application No. NCO083071 Robbinsville WTP Graham County Dear Applicant: ROY COOPER Governor MICHAEL S. BEGAN seerrnry S. JAY ZIMMERMAN Dtrretor The Water Quality Permitting Section acknowledges the October 16, 2017 receipt of your permit renewal application and supporting documentation. Your application will be assigned to a permit writer within the Section's NPDES WW permitting branch. Per G.S. 15OB-3 your current permit does not expire until permit decision on the application is made. Continuation of the current permit is contingent on timely and sufficient application for renewal of the current permit. The permit writer will contact you if additional information is required to complete your permit renewal. Please respond in a timely manner to requests for additional information necessary to allow a complete review of the application and renewal of the permit. Information regarding the status of your renewal application can be found online using the Department of Environmental Quality's Environmental Application Tracker at: https://deq.nc.gov/permits-regulations/permit guidance/environmental-application-tracker If you have any additional questions about the permit, please contact the primary reviewer of the application using the links available within the Application Tracker. Sincerely, / '=q A?J Wren The for Administrative Assistant Water Quality Permitting Section cc: Central Files w/application(ARO) ec: WQPS Laserfiche File w/application State of North Carolina I Environmental Quality I Water Resources 1617 Mail Service Center I Raleigh, North Carolina 27699-1617 919-807-6300 E McGill A S S O C I A T E S October 13, 2017 Charles Weaver, Asheville Region NPDES Unit Supervisor North Carolina Department of Environmental Quality Division of Water Resources 1617 Mail Service Center Raleigh, North Carolina 27699-1617 RE: Town of Robbinsville Rer,F-N DINCDEQ"DWR OCT 16 ZM7 Water Ouallty permitting Section Permit Renewal Application NPDES Permit No. NCO083071 Graham County, North Carolina Dear Mr. Weaver: On behalf of the Town of Robbinsville, please find enclosed the NPDES Short Form C - WTP application, site map, and process flow schematic for the above referenced discharge permit. Please feel free to contact us if you have any questions or need any additional information. Sincerely, McGILL ASSOCIATES, P.A. KYLE SEAMAN, PE Project Engineer kyle.seaman@mcgillengineers.com Enclosure cc: Steve Hooper — Mayor, Town of Robbinsville Ben Cathey, PE, McGill Associates I \Projects\2017\17 00359\Misc\NC0025879 NPDES Renewal\cwl3oct2017 docx 55 Broad Strcet P O Box 2259 ph 828 252 0575 Asheville, North Carolina 28801 Asheville, North Carolina 28802 f 828 252 2518 \\-w\% mcgillengmeers corn 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 Division of Water Quality / NPDES Unit 1617 Mail Service Center, Raleigh, NC 27699-1617 NPDES Permit Number INCO083071 If you are completing this form to 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 Facility Name Mailing Address City State / Zip Code Telephone Number Fax Number e-mail Address Town of Robbinsville Robbinsville Water Treatment Plant P.O. Box 126 Robbinsville North Carolina / 28771 (828) 479-3250 (828) 479-9272 townofrobbinsvflle@hotmall.com 2. Location of facility producing discharge: Check here if same as above ❑ Street Address or State Road 2457 Long Creek Road City Robbinsville State / Zip Code North Carolina / 28771 County Graham 3. Operator Information: Name of the firm, consultant or other entity that operates the facility (Note that this is not refemng to the Operator in Responsible Charge or ORC) Name Mailing Address City State / Zip Code Telephone Number ( ) Fax Number ( ) 4. Ownership Status: Federal ❑ State ❑ Private ❑ Public Page 1 of 4 Version 5/2012 NPDES PERMIT APPLICATION - SHORT FORM C - WTP For discharges associated with water treatment plants 5. 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) Surface water from Long, Burgan and Rock Creek. 7. Describe the treatment process(es) for the raw water: -Raw water is treated using a package treatment plant consisting of a flash mixer, flocculation chamber, settling basin, media filter and clearwell. Raw water is mixed with alum and polymer in the flash mixing. Following filtration the water is mixed with soda ash and chlorine gas prior to being sent the clearwell and distribution system. 8. Describe the wastewater and the treatment process(es) for wastewater generated by the facility: -Waste from the settling basing and media filter backwash are sent to an alum sludge lagoon, where the water is decanted and discharged into the receiving stream. 9. Number of separate discharge points: 1 Outfall Identification number(s) 001 10. Frequency of discharge: Continuous ❑ Intermittent If intermittent: Days per week discharge occurs: 2.5 - 7 Duration: 3 Hours 11. Plant design potable flowrate 0.5 MGD Backwash or reject flow 0.006 MGD (Monthly Average May 2016 - Present) 0.017 MGD (Monthly Average January 2015 - May 2016) 0.018 MGD (Permitted Maximum, Monthly Average) 12. Name of receiving stream(s) (Provide a map showing the exact location of each outfall, including latitude and longitude): -Rock Creek. See attached map for discharge location including latitude and longitude. Page 2 of Version 5/2012 NPDES PERMIT APPLICATION - SHORT FORM C - WTP For discharges associated with water treatment plants 13. Please list all water treatment additives, including cleaning chemicals or disinfection treatments, that have the potential to be discharged. Alum / aluminum sulfate Yes Iron sulfate / ferrous sulfate No Fluoride No Ammonia nitrogen / Chloramines No Zinc -orthophosphate or sweetwater CP1236 No List any other additives below: Soda Ash (Sodium Carbonate) Polymer Chlorine (Gas) 14. Is this facility located on Indian country? (check one) Yes ❑ No 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 point[s] of addition for chemicals and all discharges routed to an outfall [including stormwater]. -See Attached. Solids Handling Plan -Solids that accumulate in the Alum Sludge Lagoon are pumped into the sanitary manhole on site and then pumped on to the Town's Wastewater Treatment Plant. 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. Page 3 of 4 Version 5/2012 NPDES PERMIT APPLICATION - SHORT FORM C - WTP For discharges associated with water treatment plants 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. Steve Hooper Mayor Printed name of Penson Signing Title Date North 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 4 of 4 Version 5/2012 1 1000 0 500 1000 2000 GRAPHIC SCALE 1 INCH = 1000 FEET u ------------- c 1 n McGifl PDES PERMIVILLET WTPREN DATE DESIGNED '2'0'1'7'SHEET 2017 NPDES PERMIT RENEWAL DESIONEDBY KMs CADD BY KMS ASSOCIATE S TOWN OF ROBBINSVILLE CONST REVIEW_ TOPOGRAPHIC MAP CONST REVIEW ENGINEERING PLANNING FINANCE FILENAME 55 BROAD SSREEf MHE—E IC -1 .111N MA 71 —1 UcC sS IC 59 GRAHAM COUNTY, NORTH CAROLINA Dranngl dNg TOWN OF ROBBINSVILLE WATER TREATMENT PLANT (NC0083071) FLOW SCHEMATIC FLOCCULATION SETTLING BASIN FILTER WATER TREATMENT FLOW DIAGRAM FILTER SETTLING BASIN BACKWASH FLOW DIAGRAM McGm 0.018 MGD ALUM SLUDGE LAGOON ROCK CREEK ROBBINSVILLE LE WATER TREATMENT PLANT DATE OCT Km SHEET 2017 NPDES PERMIT RENEWAL DESIGNED BY: KMS CADD BY. KMS TOWN OF ROBBINSVILLE DESIGN REVIEW_ PROCESS FLOW SCHEMATIC ,X S S O C I A T )L, S CONST. REVIEW. _ n E N G I N F E R I N G- P L A N N I N G - F I N A N C E FIaENAME L ,S ak�AU f�REEf s14EP -11 PN. iX]B 1-75 --S-- GRAHAM COUNTY, NORTH CAROLINA Drawmgt.dwg