NC0085707_Renewal (Application)_20200319

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Governor 0'
MICHAEL S.REGAN •n-- .
Secretory �?"""'a `
S.DANIEL SMITH NORTH CAROLINA
Director Environmental Quality
March 19, 2020
Dare County
Attn: Patrick Irwin, Utilities Dir.
PO Box 1000
Manteo, NC 27954-1000
Subject: Permit Renewal
Application No. NC0085707
Cape Hatteras Reverse Osmosis WTP
Dare County
Dear Applicant:
The Water Quality Permitting Section acknowledges the March 17, 2020 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. 150E-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.
Trelyn i vo,
Wren Th ford
Administrative Assistant
Water Quality Permitting Section
cc: Central Files w/application
ec: WQPS Laserfiche File w/application
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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 NC0085707
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 Dare County Water Department
Facility Name Cape Hatteras Reverse Osmosis WTP
Mailing Address 600 Mustian Street
City Kill Devil Hills RECEIVED
State / Zip Code NC, 27948 1�9�
MAR17
Telephone Number [phone]
Fax Number [phone] NIGuEQIDWRINPDES
e-mail Address [e-mail]
2. Location of facility producing discharge:
Check here if same as above ❑
Street Address or State Road 50225 Water Association Road
City Frisco
State / Zip Code NC, 27936
County Dare
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 Dare County Water Department
Mailing Address 600 Mustian Street
City Kill Devil Hills
State / Zip Code NC
Telephone Number [phone]
Fax Number [phone]
4. Ownership Status:
Federal ❑ State ❑ Private ❑ Public X
Page 1 of 3 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)
X Ion Exchange (Sodium Cycle Cationic ion exchange)
❑ Green Sand Filter (No sodium recharge)
X 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)
Groundwater
7. Describe the treatment process(es) for the raw water:
The treatment train includes: Reverse osmosis (membrane), ion exchange, pressure sand filters,
cartridge filters, settling basin and chlorination.
8. Describe the wastewater and the treatment process(es) for wastewater generated by the
facility:
Combined concentrate wastewaters from reverse osmosis treatment, anion
backwash/regeneration treated water, and pressure sand filter backwash treated water will be
flowed to the discharge via pipeline to a diffuser.
9. Number of separate discharge points: 1
Outfall Identification number(s) 001
10. Frequency of discharge: Continuous X Intermittent ❑
If intermittent:
Days per week discharge occurs: Duration:
11. Plant design potable flowrate 2_0 MGD
Backwash or reject flow 0.743 MGD
12. Name of receiving stream(s) (Provide a map showing the exact location of each outfall, including
latitude and longitudes
Map is attached.
13. Please list all water treatment additives, including cleaning chemicals or disinfection
treatments, that have the potential to be discharged.
Alum / aluminum sulfate Yes No X
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 No X
Fluoride Yes No X
Ammonia nitrogen / Chloramines Yes No X
Zinc-orthophosphate or sweetwater CP1236 Yes No X
List any other additives below:
Scale inhibitor
Citric acid and sodium hydroxide (membrane cleaning chemicals)
14. Is this facility located on Indian country? (check one)
Yes ❑ No X
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].
Schematic is attached.
• Solids Handling Plan-The treatment does not produce solids.
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.
Patrick Irwin Utilities Director
Print name of Person Signing Title
z u-/' 3 9 z e i o
Signature of Applicant Da e
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 3 of 3 Version 5/2012

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