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NC0083071_Renewal (Application)_20220715
`:; STATE o MnY ,», ROY COOPER 4 -- r Governor 9. ELIZABETH S.BISER �`• '°°„`'' Secretary tati �` • RICHARD E.ROGERS,JR. NORTH CAROLINA Director Environmental Quality • July 18, 2022 Town of Robbinsville Attn: Shaun Adams, Mayor PO Box 126 Robbinsville, NC 28771-0126 Subject: Permit Renewal Application No. NC0083071 Robbinsville WTP Graham County Dear Applicant: The Water Quality Permitting Section acknowledges the July 15, 2022 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. 150B-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, itiAl dr---03 Wren Thedford Administrative Assistant Water Quality Permitting Section cc: MJ Chen,PE-McGill Associates ec: WQPS Laserfiche File w/application -D_E Q North Carolina Department of Environmental Quality I Division of Water Resources Asheville Regional O(flce 2090 U.S.Highway 70 Swannanoa.North Carolina 28778 w.a -�+\ 828.29b.4500 r IT)cg i I I Shaping Communities Together July 14,2022 Ms. Wren Thedford NC DEQ/DWR/NPDES 1617 Mail Service Center Raleigh,North Carolina 27699-1617 RECEIVED JUL 15 2022 RE: Town of Robbinsville NCDEQ/DWRINPDES Permit Renewal Application NPDES Permit No.NC0083071 Graham County,North Carolina Dear Ms. Wren, On behalf of the Town of Robbinsville, please find enclosed EPA Application Form 1, EPA Application Form 2E, 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 at mj.chen(mcgillassociates.com or by telephone at 828-412-4597. Sincerely, McGILL ASSOCIATES, P.A. //7 MJ Chen, PhD, PE Senior Project Manager MCGILL ASSOCIATES 55 BROAD STREET,ASHEVILLE, NC 28801/828.252.0575/MCGILLASSOCIATES.COM r United States Office of Water EPA Form 3510-1 Environmental Protection Agency Washington,D.C. Revised March 2019 Water Permits Division .&EPA Application Form 1 General Information NPDES Permitting Program Note: All applicants to the National Pollutant Discharge Elimination System(NPDES)permits program, with the exception of publicly owned treatment works and other treatment works treating domestic sewage,must complete Form 1. Additionally, all applicants must complete one or more of the following forms: 2B,2C, 2D, 2E, or 2F. To determine the specific forms you must complete, consult the "General Instructions"for this form. EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19 NC0083071 Robbinsville Long Creek Water OMB No.2040-0004 Form U.S.Environmental Protection Agency 1 \-/EPA Application for NPDES Permit to Discharge Wastewater NPDES GENERAL INFORMATION SECTION 1.ACTIVITIES REQUIRING AN NPDES PERMIT(40 CFR 122.21(f)and(f)(1)) 1.1 Applicants Not Required to Submit Form 1 Is the facility a new or existing publicly owned Is the facility a new or existing treatment works 1.1.1 12 treatment works? 1. . treating domestic sewage? If yes,STOP.Do NOT complete No If yes,STOP.Do NOT ❑� No Form 1.Complete Form 2A. complete Form 1.Complete Form 2S. 1.2 Applicants Required to Submit Form 1 1.2.1 Is the facility a concentrated animal feeding 1.2.2 Is the facility an existing manufacturing, operation or a concentrated aquatic animal commercial,mining,or silvicultural facility that is a production facility? currently discharging process wastewater? oYes 4 Complete Form 1 ❑✓ No ❑ Yes 4 Complete Form �✓ No a and Form 2B. 1 and Form 2C. c1.2.3 Is the facility a new manufacturing,commercial, 1.2.4 Is the facility a new or existing manufacturing, mining,or silvicultural facility that has not yet commercial,mining,or silvicultural facility that -__ commenced to discharge? discharges only nonprocess wastewater? d El Yes 4 Complete Form 1 ❑✓ No �✓ Yes 4 Complete Form ❑ No ce and Form 2D. 1 and Form 2E. 1.2.5 Is the facility a new or existing facility whose ' discharge is composed entirely of stormwater associated with industrial activity or whose discharge is composed of both stormwater and non-stormwater? Yes 4 Complete Form 1 ❑✓ No and Form 2F unless exempted by 40 CFR 122.26(b)(14)(x)or b 15 . SECTION 2.NAME, MAILING ADDRESS,AND LOCATION(40 CFR 122.21(f)(2)) 2.1 Facility Name Robbinsville Long Creek Water `0 2.2 EPA Identification Number 0 -J v 2.3 Facility Contact Name(first and last) Title Phone number Shaun Adams Mayor (828)735-9382 a Email address townofrobbinsville@hotmail.com 2 2.4 Facility Mailing Address zStreet or P.O.box Post Office Box 126 City or town State ZIP code Robbinsville NC 28771 EPA Form 3510-1(revised 3-19) Page 1 EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19 NC0083071 Robbinsville Long Creek Water OMB No.2040-0004 2.5 Facility Location z = Street,route number,or other specific identifier o 2457 Long Creek Road a_ 0 County name County code(if known) `s is Graham M J co City or town State ZIP code o z Robbinsville NC 28771 SECTION 3.SIC AND NAICS CODES(40 CFR 122.21(f)(3)) 3.1 SIC Code(s) Description(optional) 4941 Water Supply N o 0 U co U 3.2 NAICS Code(s) Description(optional) 221310 Water Filtration Plant N SECTION 4.OPERATOR INFORMATION(40 CFR 122.21(f)(4)) 4.1 Name of Operator Town of Robbinsville 0 4.2 Is the name you listed in Item 4.1 also the owner? ❑� Yes ❑ No 4.3 Operator Status ❑ Public—federal ❑ Public—state Other public(specify)Municipal O ❑ Private ❑ Other(specify) 4.4 Phone Number of Operator (828)479-2886 4.5 Operator Address Street or P.O. Box E Post Office Box 126 0 •� City or town State ZIP code `0 0 Robbinsville NC 28771 io U a Email address of operator O townofrobbinsville@hotmail.com SECTION 5.INDIAN LAND(40 CFR 122.21(f)(5)) 0 0 5.1 Is the facility located on Indian Land? J ❑ Yes ❑✓ No EPA Form 3510-1(revised 3-19) Page 2 I EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19 NC0083071 Robbinsville Long Creek Water OMB No.2040-0004 SECTION 6.EXISTING ENVIRONMENTAL PERMITS(40 CFR 122.21(f)(6)) 6.1 Existing Environmental Permits(check all that apply and print or type the corresponding permit number for each) d NPDES(discharges to surface ❑ RCRA(hazardous wastes) ❑ UIC(underground injection of o r water) fluids) NC0083071 • ❑ PSD(air emissions) ❑ Nonattainment program(CM) ❑ NESHAPs(CM) a. w 0 Ocean dumping(MPRSA) ❑ Dredge or fill(CWA Section 404) ❑ Other(specify) SECTION 7.MAP(40 CFR 122.21(f)(7)) 7.1 Have you attached a topographic map containing all required information to this application?(See instructions for ,>a specific requirements.) ❑� Yes ❑ No ❑ CAFO—Not Applicable(See requirements in Form 2B.) SECTION 8.NATURE OF BUSINESS(40 CFR 122.21(f)(8)) 8.1 Describe the nature of your business. The Long Creek WTP is a single train,package plant that includes flash mixing,single stage flocculation, sedimentation,and filtration.The flash mixer is a dual impeller mixer,and the flocculator is a vertically mounted ra paddle style mixer.The settling basin is equipped with tube settlers with clarified water collected by troughs which N carry the settled water to a single mixed media filter equipped with surface sweeps for use during filter backwash cycles.Filtered water flows into a small(6'x 8')sump where it is them pumped via a vertical turbine pump into the clearwell.Post treatment chemicals,caustic soda and chlorine are injected into the discharge of this effluent pump. A 20 HP backwash pump is used to backwash the filters with finished water from the clearwell. Backwash water is discharged to a 60'x 90'x 5'lined,sludge lagoon.This lagoon also collects sludge removed from the sedimentation basin and flocculation basin via an in-line solids pump. SECTION 9.COOLING WATER INTAKE STRUCTURES(40 CFR 122.21(f)(9)) 9.1 Does your facility use cooling water? d ❑ Yes 2 No 4 SKIP to Item 10.1. 9.2 Identify the source of cooling water.(Note that facilities that use a cooling water intake structure as described at CT). 40 CFR 125,Subparts I and J may have additional application requirements at 40 CFR 122.21(r).Consult with your o Y NPDES permitting authority to determine what specific information needs to be submitted and when.) o ,a 0 SECTION 10.VARIANCE REQUESTS(40 CFR 122.21(f)(10)) 10.1 Do you intend to request or renew one or more of the variances authorized at 40 CFR 122.21(m)?(Check all that apply.Consult with your NPDES permitting authority to determine what information needs to be submitted and when.) ❑ Fundamentally different factors(CWA ❑ Water quality related effluent limitations(CWA Section c Section 301(n)) 302(b)(2)) ❑ Non-conventional pollutants(CWA ❑ Thermal discharges(CWA Section 316(a)) Section 301(c)and(g)) ❑✓ Not applicable EPA Form 3510-1(revised 3-19) Page 3 r EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19 NC0083071 Robbinsville Long Creek Water OMB No.2040-0004 SECTION 11.CHECKLIST AND CERTIFICATION STATEMENT(40 CFR 122.22(a)and(d)) 11.1 In Column 1 below,mark the sections of Form 1 that you have completed and are submitting with your application. For each section,specify in Column 2 any attachments that you are enclosing to alert the permitting authority.Note that not all applicants are required to provide attachments. Column 1 Column 2 ❑✓ Section 1:Activities Requiring an NPDES Permit ❑ wl attachments ❑✓ Section 2: Name,Mailing Address,and Location ❑ w/attachments ❑✓ Section 3:SIC Codes ❑ wl attachments ❑✓ Section 4:Operator Information ❑ w/attachments ❑✓ Section 5: Indian Land ❑ w/attachments ❑✓ Section 6: Existing Environmental Permits ❑ w/attachments w/topographic d ❑✓ Section 7:Map ❑✓ ❑ w/additional attachments map co o ❑✓ Section 8:Nature of Business ❑ wl attachments ❑✓ Section 9:Cooling Water Intake Structures ❑ w/attachments ❑✓ Section 10:Variance Requests ❑ w/attachments ❑✓ Section 11:Checklist and Certification Statement ❑ w/attachments • 11.2 Certification Statement 1 certify under penalty of law that this document and all attachments were prepared under my direction or supervision in accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted.Based on my inquiry of the person or persons who manage the system,or those persons directly responsible for gathering the information,the information submitted is,to the best of my knowledge and belief,true,accurate,and complete.I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations. Name(print or type first and last name) Official� title Sh gun Ads /" t 0 r Signature Date signed EPA Form 3510-1(revised 3-19) Page 4 „"--1J .,-„/ ,i. 1,e(a_, , )-L, (y-, s-r\,...-_,--,._7,/ HERO ,4 ,� \ 7 1 ,--.'.\m‘a-i-,,-\-i\_,._,,,,,,0f);__,.),,, ``y11' i ^� ,-sWF \_. �,,_,_,„,., �z SM AY\ _: C:, 1\\,�� \ G� �`��, �-} /1 .■. m wA�R R0� ' , r ---,1,C,., 1,-/_,f\)\s.,.‘\- '.--.),, N , \ '�-� J �bb e _ i ,--,..._: --,, -4..., -, ) \,-\\% j 4- 3------ , )41 2-""t___\\p 7 \-- \ \ ,-, r-Z-r- ri:i',.,_":,,z-/jr-1-' —r--"--:::::-„___J C �'\ LHTE y �' �51f`�G' Millt / = �a /L/C ter✓ i ✓� s_, \.. /11 — �\ JJ ` 7-2 / �� Ir.____,--1 r (, e� Cti.✓ ,� a ,' ,�f i ,J --^,, ) m ,-- \,3,-s n ,-, \ .. ,ija -__ c ,____ LA \ ,-,,,—s ....._ (% ,r /_ .,, v,._., __,.., 0 (:->ls ',_..)1 f / `.y ' i ( ,; zsro.. `i. Jr g `� a„ ins F� • 5 HDUO P. (‘.,. c,__,,,y,j E)(.1 toi :--.1-5‘ ....— 11111‘ i( I� � ._ `1 r I u Gap ( ! , 1.. ' �! c �, �_, } J ) ROBBINSVILLE �,t > ( - 7 ' j L \ ---) \- -- �t � v, \\ ° i % .—) ? c� �_ (-- WTP NC0083071 1..� T+ ��s (r 1 Gap'\ �1...�� /lea ' ,� \�� %f'�N �,_,��; l Jam, , o �� / `s(i .,\, \ f � 1 � lrf \ \ ,,,_,..12 .„...( S-'\-/'-' J S ( ^ 1 ( / S , ._ t `\�' 4 I/`�rj ( ) \ A ''•/1�` ,,� Asa v C' r`\a \ am r /,\L J r L., �\ , ,) tic.\.`1 l I t �^ ( ' /�,,Oa�,, .�/ 'c DATE PROJECT ROBBINSVILLE WTP SHEET ,� JuLCEMA 2DESIGNER 2022 NPDES PERMIT RENEWAL 2000 0 1000 2000 4000 1 -55&uetlSG2 OFFICE MANAGER DEGIGIJER TOWN OF ROBBINSVILLE1 Inc III AewrAb NC2a901 MARKGTNEY PE SARAN TOPOGRAPHIC MAP 828.252.0575 GRAPHIC SCALE DIVISION VALUE=2000 FEET NC Finn LlcenseRC-0<a5 pROIECT MANAGER REVIEWER ">ec�iiOCi°'O°6O”' MJCHEN,PhD.PE GRAHAM COUNTY,NORTH CAROLINA 7 WATER TREATMENT FLOW DIAGRAM 0 J 0 2 J O O cn a a cn a CHEMICAL FEED - OW- 0.500 MGD INN— PAW WATER © . 0.500 MU) ow— FILTER EFFLUENT FLOCCULATION SETTLING BASIN PUMP BACKWASH FLOW DIAGRAM a 0.0045 MGDam- - ! 0.0179 C. i i SETTLING BASIN i ALUM SLUDGE LAGOON ROCK CREEK 4 s a 3 sf 0.01745 M D i FINISHED WATER ----_- BACKWASH PUMP 3 $ FILTER DATE PROJECT ROBBINSVILLE WTI' JULY 2022 2200328 SHEET ,n 55 aoea Street OFFICE MANAGER DESIGNER 2022 NPDES PERMIT RENEWAL mcgill Ashe h NC2a901 NOT TO SCALE PROCESS FLOW MARK PE SARAR KARAN TOWN OF ROBBINSVILLE 1 azazs2.a5r5 SCHEMATIC NC E,nn license k C-0455 PROJECT MANAGER ,REVIEWER '""g""Oe1e1" "' MJ CHEN.PhD PE kXXYXX", GRAHAM COUNTY.NORTH CAROLINA United States Office of Water EPA Form 3510-2E Environmental Protection Agency Washington,D.C. Revised March 2019 Water Permits Division ..EPA Application Form 2E Manufacturing , Commercial , Mining , and Silvicultural Facilities Which Discharge Only Nonprocess Wastewater NPDES Permitting Program Note: Complete this form and Form 1 if your facility is a new or existing manufacturing, commercial, mining, and silvicultural facility that discharges only nonprocess wastewater. r EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19 NC0083071 Robbinsville Long Creek Water OMB No.2040-0004 U.S.Environmental Protection Agency FORM Application for NPDES Permit to Discharge Wastewater 2E .-.EPA NPDES MANUFACTURING,COMMERCIAL,MINING,AND SILVICULTURAL FACILITIES WHICH DISCHARGE ONLY NONPROCESS WASTEWATER SECTION 1.OUTFALL LOCATION(40 CFR 122.21(h)(1)) 1.1 Provide information on each of the facilit 's outfalls in the table below. o Outfall Receiving Water Name Latitude Longitude Number R V O 001 Rock Creek 35' 16' 46" N El 83° 49' 05' W El RI o ° �. 3 o ' ,, o , n SECTION 2.DISCHARGE DATE(40 CFR 122.21(h)(2)) 2.1 Are you a new or existing discharger?(Check only one response.) s El New discharger ❑✓ Existing discharger 4 SKIP to Section 3. ✓ 2.2 Specify your anticipated discharge date: 0 SECTION 3.WASTE TYPES(40 CFR 122.21(h)(3)) 3.1 What types of wastes are currently being discharged if you are an existing discharger or will be discharged if you are a new discharger?(Check all that apply.) ❑ Sanitary wastes 0 Other nonprocess wastewater(describe/explain ElRestaurant or cafeteria waste directly below) Q ❑ Non contact cooling water Backwash flow is discharged to a lined,sludge I- 3.2 Does the facility use cooling water additives? R ❑ Yes ElNo 4 SKIP to Section 4. 3.3 List the cooling water additives used and describe their corn.osition. Cooling Water Additives Composition of Additives (list) (if available to you) SECTION 4.EFFLUENT CHARACTERISTICS(40 CFR 122.21(h)(4)) 4.1 Have you completed monitoring for all parameters in the table below at each of your outfalls and attached the results to this application package? ❑✓ Yes ❑ No;a waiver has been requested from my NPDES permitting authority (attach waiver request and additional information)4 SKIP to Section 5. 4.2 Provide data as requested in the table below.' (See instructions for specifics.) H Number of Maximum Daily Average Daily Source .y Parameter or Pollutant Analyses Discharge Discharge (use codes 'F6 (if actual data (specif, units) (sped units) per 1.1 reported) Mass Conc. Mass Conc. instructions) co t Biochemical oxygen demand(BOD5) Total suspended solids(TSS) 32 5.7 mg/L 2.7 mg/L 1 d CD Oil and grease E w Ammonia(as N) Discharge flow 74 0.0179 mgd 1 pH(report as range) 32 6.1-7 1 Temperature(winter) Temperature(summer) 1 Sampling shall be conducted according to sufficiently sensitive test procedures(i.e.,methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or required under 40 CFR chapter I,subchapter N or 0.See instructions and 40 CFR 122.21(e)(3). EPA Form 3510-2E(revised 3-19) Page 1 r EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19 NC0083071 Robbinsville Long Creek Water OMB No.2040-0004 4.3 Is fecal coliform believed present,or is sanitary waste discharged(or will it be discharged)? ❑ Yes ❑✓ No 4 SKIP to Item 4.5. 4.4 Provide data as requested in the table below., (See instructions for specifics.) Number of Maximum Daily Average Daily Source Parameter or Pollutant Analyses Discharge Discharge (Use codes (if actual data (specify units) (specify units) per reported) Mass Conc. Mass Conc. Instructions.) Fecal coliform E.coli Enterococci O 4.5 Is chlorine used(or will it be used)? cn ❑✓ Yes El No 4 SKIP to Item 4.7. .• 4.6 Provide data as requested in the table below., (See instructions for specifics.) cu Number of Maximum Daily Average Daily Source m Parameter or Pollutant Analyses Discharge Discharge (use codes - (if actual data (specify units) (specify units) per w reported) Mass Conc. Mass Conc. instructions) c 3 Total Residual Chlorine 32 42 ug/L 17.8 ugh 1 w 4.7 Is non-contact cooling water discharged(or will it be discharged)? ❑ Yes 0 No 4 SKIP to Section 5. 4.8 Provide data as requested in the table below.1 (See instructions for specifics.) Number of Maximum Daily Average Daily Source Parameter or Pollutant Analyses Discharge Discharge (use codes (if actual data (specify units) (specify units) per reported) Mass Conc. Mass Conc. instructions) Chemical oxygen demand(COD) Total organic carbon(TOC) SECTION 5.FLOW(40 CFR 122.21(h)(5)) 5.1 Except for stormwater water runoff,leaks,or spills,are any of the discharges you described in Sections 1 and 3 of this application intermittent or seasonal? ❑✓ Yes 4 Complete this section. ❑ No 4 SKIP to Section 6. 33 5.2 Briefly describe the frequency and duration of flow. ET- Discharge is intermittent and it occurs 7 days a week for 30-60 minutes. SECTION 6.TREATMENT SYSTEM(40 CFR 122.21(h)(6)) E 6.1 Briefly describe any treatment system(s)used(or to be used). N The Robbinsville Long Creek WTP is a single train,package plant that includes flash mixing,single stage flocculation, co sedimentation,and filtration.Post treatment chemicals,caustic soda and chlorine are injected into the discharge of this effluent pump.A backwash pump is used to backwash the filters with finished water from the clearwell. Backwash E water is discharged to a lined,sludge lagoon.This lagoon also collects sludge removed from the sedimentation basin 6 and flocculation basin via an in-line solids pump. I- 1 Sampling shall be conducted according to sufficiently sensitive test procedures(i.e.,methods)approved under 40 CFR 136 for the analysis of pollutants or pollutant parameters or required under 40 CFR chapter I,subchapter N or 0.See instructions and 40 CFR 122.21(e)(3). EPA Form 3510-2E(revised 3-19) Page 2 EPA Identification Number NPDES Permit Number Facility Name Form Approved 03/05/19 NC0083071 Robbinsville Long Creek Water OMB No.2040-0004 SECTION 7.OTHER INFORMATION(40 CFR 122.21(h)(7)) 7.1 Use the space below to expand upon any of the above items.Use this space to provide any information you believe the reviewer should consider in establishing permit limitations.Attach additional sheets as needed. N/A 0 Co E `0 c a� O SECTION 8.CHECKLIST AND CERTIFICATION STATEMENT(40 CFR 122.22(a)and(d)) 8.1 In Column 1 below,mark the sections of Form 2E that you have completed and are submitting with your application. For each section,specify in Column 2 any attachments that you are enclosing to alert the permitting authority. Note that not all applicants are required to provide attachments. Column 1 Column 2 ❑✓ Section 1:Outfall Location 0 w/attachments(e.g.,responses for additional outfalls) ❑✓ Section 2:Discharge Date 0 w/attachments ❑✓ Section 3:Waste Types ❑ w/attachments 0 Section 4:Effluent Characteristics ❑ w/attachments ❑� Section 5:Flow ❑ w/attachments N ❑✓ Section 6:Treatment System ❑ w/attachments w ❑✓ Section 7:Other Information ❑ w/attachments ❑✓ Section 8:Checklist and Certification Statement 0 w/attachments y 8.2 Certification Statement 1 certify under penalty of law that this document and all attachments were prepared under my direction or supervision in i accordance with a system designed to assure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system,or those persons directly responsible for gathering the information, the information submitted is,to the best of my knowledge and belief,true, accurate,and complete. lam aware that there are significant penalties for submitting false information,including the possibility of fine and imprisonment for knowing violations. Name(print or type first aAdo,m_s d last name) Official title 31 aw" /Vl a.--y Signature Date signed EPA Form 3510-2E(revised 3-19) Page 3