NC0083909_Permit Issuance_20180112

ROY COOPER
Gavemor
Water Resources
ENVIRONMENTAL OUAIITY
January 12, 2018
Mr. Ken Flatt, Utilities Director
Dare County
600 Mustian Street
Kill Devil Hills, NC 27948
MICHAEL S. REGAN
Sevetary
LINDA CULPEPPER
huerim Director
Subject: NPDES PERMIT ISSUANCE
NPDES Permit NCO083909
Rodanthe/Waves/Salvo Reverse Osmosis WTP
Class PC-1
Dare County
Dear Mr. Flatt:
Division personnel have reviewed and approved your application for renewal of the subject permit.
Accordingly, we are forwarding the attached final NPDES discharge permit. This permit is issued
pursuant to the requirements of North Carolina General Statute 143-215.1 and the Memorandum of
Agreement between North Carolina and the U.S. Environmental Protection Agency dated October 15,
2007 (or as subsequently amended).
The final permit includes the following significant changes from the existing permit:
➢ Section A. (4) has been added to require electronic submission of effluent data, and a footnote
has been added in Section A. (1). Federal regulations require electronic submittal of all
discharge monitoring reports (DMRs).
➢ Regulatory citations have been added to the permit.
➢ Parameter codes have been updated in Section A. (1).
➢ Outfall map has been updated.
➢ Language has been updated on the Supplement to Permit Cover Sheet based on current NPDES
permit formatting.
➢ The facility address has been updated on the cover sheet and Supplement to Permit Cover Sheet
per the permit renewal application.
➢ Monitoring and limits have been added for total residual chlorine in Section A. (1) per the
current water treatment plant strategy.
➢ Monitoring has been added for turbidity in Section A. (1) per the current water treatment plant
strategy.
➢ The column for weekly average limits in Section A. (1) has been removed.
➢ Limits have been added for Total Nickel and Total Zinc based on a reasonable potential to
exceed water quality standards.
➢ Limits have been removed for Total Selenium and monitoring has been reduced to quarterly
based on a reasonable potential analysis.
State of North Carolina I Environmental Quality I Water Resources
1617 Mail Service Center I Raleigh, NC 27699-1617
919 807 6333 919-807-6389 FAX
https:lldeq.nc.govlabouttdivisionslwater-resourceslwater-resources-permitslwastewater-bmchlnpdes-wastewater-permits

Mr. Ken Flatt
NCO083909 Issued Permit
➢ Limits for Total Arsenic have been changed based on a reasonable potential to exceed current
water quality standards.
➢ Monitoring has been removed for the following parameters in Section A. (1): Total Cadmium,
Total Chromium, Total Cyanide, Total Lead, Total Mercury, and Total Silver. These parameters
did not display a potential to exceed water quality standards.
➢ Language has been added in Section A. (1) stating "All samples collected should be from a
representative discharge event" per current NPDES permit guidelines.
➢ The language and footnote for aquatic toxicity monitoring has been updated in Section A. (1),
and the language in Section A. (2) has been updated.
➢ Section A. (3) has been added requiring a discharge alternatives evaluation as the facility has a
history of failed toxicity tests.
The final permit includes the following significant changes from the draft permit:
➢ Limits for Total Arsenic, Total Nickel, and Total Zinc have been adjusted based on a review of
when the surface water was classified HQW.
Mr. Patrick Irwin, Assistant Utilities Director for Dare County, submitted comments on the draft
permit, which were received by the Division on October 25, 2017. Concerning the comment for Total
Residual Chlorine, as stated during our phone call on December 14, 2017, monitoring and the footnote
for Total Residual Chlorine in Section A. (1) will remain in the permit. The limit is dictated by the
receiving stream; however, monitoring and compliance are only required if chlorine or chlorine
derivatives are added to water that is eventually discharged. Concerning the comment for Total
Arsenic, as stated during our phone call on December 14, 2017, after additional review, the permit
history indicates that the HQW classification was not applied in the previous 2010 permit renewal,
stating that the permit and discharge predated the change in surface water classification to HQW.
Therefore, the data analysis for the current renewal has been updated, changing the acute and chronic
limits for total arsenic in Section A. (1). Concerning the comment for the discharge alternatives
evaluation, as stated during our phone call on December 14, 2017, the Discharges Alternatives
Evaluation requirement will remain in the permit. This evaluation is due to the Division six (6) months
prior to permit expiration.
Please note that the receiving stream is listed as an impaired waterbody on the North Carolina 303(d)
Impaired Waters List. Addressing impaired waters is a high priority with the Division, and instream
data will continue to be evaluated. If there is noncompliance with permitted effluent limits and stream
impairment can be attributed to your facility, then mitigative measures may be required.
Whole Effluent Toxicity test results submitted during the past three years have demonstrated that the
Water Treatment Plant's effluent is showing potential for causing aquatic toxicity in the receiving
stream. As a result, the Rodanthe/Waves/Salvo RO WTP shall perform a Discharge Alternatives
Evaluation as described in Section A. (3) of this permit. This evaluation is being requested to determine
whether there are any economical and technologically feasible alternatives available to the
Rodanthe/Waves/Salvo RO WTP to comply with all NC Water Quality Standards. The permittee will be
given approximately one permit cycle to evaluate and document possible treatment/discharge
alternatives to eliminate aquatic toxicity. The evaluation shall be submitted with the permittee's next
permit renewal application and will be carefully reviewed by the Division and the results will be used in

Mr. Ken Flatt
NC0083909 Issued Permit
the development of a compliance schedule or possible variance request for the Rodanthe/Waves/Salvo
RO WTP.
If any parts, measurement frequencies or sampling requirements contained in this permit 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 (6714 Mail Service Center, Raleigh, North Carolina 27699-6714). Unless such
demand is made, this permit shall be final and binding.
Please note that this permit is not transferable except after notice to the Division. The Division may
require modification or revocation and reissuance of the permit. This permit does not affect the legal
requirements to obtain any other Federal, State, or Local governmental permit that may be required.
If you have any questions or need additional information, please do not hesitate to contact Brianna
Young of my staff at [phone].
c ely,
Linda Culpepper
Interim Director, Division of Water Resources
cc: NPDES Files
Central files
Washington Regional Office
ec: WSS/Aquatic Toxicology Branch
Patrick Irwin, Dare County [[e-mail]

Permit NCO083909
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENTAL QUALITY
DIVISION OF WATER RESOURCES
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
PDES
In compliance with the provision of North Carolina General Statute 143-215.1, other lawful standards
and regulations promulgated and adopted by the North Carolina Environmental Management
Commission, and the Federal Water Pollution Control Act, as amended,
Dare County
is hereby authorized to discharge wastewater from a facility located at the
Rodanthe/Waves/Salvo Reverse Osmosis Water Treatment Plant
23697 Highway 12
Rodanthe
Dare County
to receiving waters designated as Blackmar Gut in the Pasquotank River Basin in accordance with
effluent limitations, monitoring requirements, and other conditions set forth in Parts I, II, III and IV
hereof.
This permit shall become effective February 1, 2018.
This permit and authorization to discharge shall expire at midnight on December 31, 2022.
Signed this day January 12,;ternim
a Culpepper
Director, Division of Water Resources
By Authority of the Environmental Management Commission
Page 1 of 8

Permit NCO083909
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge, are hereby
revoked. The exclusive authority to operate this facility arises under this permit. The authority to
operate the facility under previously issued permits bearing this number is no longer effective. The
conditions, requirements, terms and provisions of this permit authorizing discharge under the
NPDES govern discharges from this facility.
Dare County
is hereby authorized to:
1. Continue to operate a Reverse Osmosis water treatment plant with a discharge of reverse osmosis
concentrate reject water. This water treatment plant currently has a design potable flowrate of 1.25
MGD and a maximum, monthly average wastewater discharge of 0.188 MGD. This facility is
located at 23697 Highway 12 in Rodanthe in Dare County. Water and wastewater treatment consists
of:
• Replaceable cartridge filters
• Inhibitor addition system
• Reverse osmosis unit
• Submerged discharge
2. Discharge from said drinking water treatment facility at the location specified on the attached map
into Blackmar Gut [stream segment 30-22-13], currently classified SA-HQW waters in subbasin 03-
01-55 [HUC: 0301020515] in the Pasquotank River Basin.
Paget of

Permit NCO083909
PART I
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
[15A NCAC 02B .0400 et seq., 02B .0500 et seq.]
During the period beginning on the effective date of the permit and lasting until expiration, the Permittee is
authorized to discharge through a diffuser from Outfall 001. Such discharges shall be,limited and monitored' by
the Permittee as specified below:
f MITI, '.
'^�.rl,.. s:x: �•.La.--..a�is':b..:ssl� en' w�:�
.x✓_ 'x^
`�.x���'!�r5 :u
:..`..�. M!€�• Fay.
L•.«:•:Y.-�P
i. .i.�1JHM�4M��,.
Flow 50050
Continuous
Recording
E
Dissolved Oxygen3 00300
Monthly
Grab
E, U, D
Salin' 00480
Monthly
Grab
E, U, D
Conductivi 00094
MonthlyGrab
E, U, D
H 00400
Not < 6.8 S.U. nor > 8.5 S.U.
2/Month
Grab
E
H 00400
Monthly
Grab
U, D
Total Residual Chlorine 4 50060
13
jgA
2/Month
Grab
E
Total Dissolved Solids 0295
Monthly
Grab
E
Turbid' 00070
Monthly
Grab
E
Total Arsenic 01002
10 pgA
10 pgA
Monthly
Grab
E
Total Zinc, 01092
85.6 /L
95.1 /L
Mon thl
Grab
E
Total Nickel 01067
8.30 L
74.70 /L
Months
Grab
E
Ammonia Nitrogen C0610
Monthly
Grab
E
Total Copper, pgA 01042
Quartedy
Grab
E
Total Selenium 01147
Quartedy
Grab
E
Total Nitroens C0600
Quartedy
Grab
E
Total Phosphorus C0665
Quartedy
Grab
E
WET Monitodn s GE3E
Monitor
& Report
Quartedy
Grab
E
Footnotes:
1. The permittee shall submit discharge monitoring reports electronically using the NC DWR's eDMR application system
[see Section A. (4)].
2. E = Effluent, effluent samples shall be collected at point after mixing of effluent wastewater from all treatment units and
prior to discharge, unless otherwise noted. U = Upstream, 27 feet north of the discharge outfall, D = Downstream, 50 feet
south of the discharge outfall.
3. The permittee may petition the Division to have Dissolved Oxygen (DO) monitoring removed as part of the next permit
renewal application. The facility must demonstrate that the discharge has no significant impact on the DO and temperature
levels in the receiving stream.
4. Limit and monitor only if the facility adds chlorine or chlorine derivatives to water that is eventually discharged. The
Division shall consider all effluent TRC values reported below 50 µg/L to be in compliance with the permit. However,
the Permittee shall continue to record and submit all values reported by a North Carolina certified laboratory including
field certified), even if these values fall below 50 µg/L.
5. Total Nitrogen (TN) = (NO2-N + NO3 N) + TKN.
6. Acute Toxicity 24-hr Pass/fail Monitoring: January, April, July, and October. Permittee shall use mysid shrimp as the test
organism unless another organism of equal or greater sensitivity is deemed more appropriate based on the characteristics
of the discharge and receiving stream. See Special condition A. (2) for details.
All samples collected should be from a representative discharge event.
There shall be no discharge of floating solids or visible foam in other than trace amounts.
Page 3 of 8

Permit NCO083909
A. (2.) ACUTE TOXICITY PASS/FAIL MONITORING ONLY (QUARTERLY)
[15A NCAC 02B .0500 et seq.]
The permittee shall conduct acute toxicity tests on a guarterly basis using protocols defined in the North
Carolina Procedure Document entitled "Pass/Fail Methodology For Determining Acute Toxicity In A
Single Effluent Concentration" (Revised -December 2010 or subsequent versions). The monitoring shall
be performed as a Mysid Shrimp (Mysidopsis bahia) 24 hour static test. The effluent concentration at
which there may be at no time significant acute mortality is 90% (defined as treatment two in the
procedure document). The tests will be performed during the months of January, April, July, and
October. These months signify the first month of each three month toxicity testing quarter assigned to
the facility. Effluent sampling for this testing must be obtained during representative effluent discharge
and shall be performed at the NPDES permitted final effluent discharge below all treatment processes.
All toxicity testing results required as part of this permit condition will be entered on the Effluent
Discharge Monitoring Form (MR-1) for the month in which it was performed, using the parameter code
TGE3E. Additionally, DWR Form AT-2 (original) is to be sent to the following address:
Attention: North Carolina Division of Water Resources
Water Sciences Section/Aquatic Toxicology Branch
1621 Mail Service Center
Raleigh, NC 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Water Sciences Section no later than 30
days after the end of the reporting period for which the report is made.
Test data shall be complete and accurate and include all supporting chemical/physical measurements
performed in association with the toxicity tests, as well as all dose/response data. Total residual chlorine
of the effluent toxicity sample must be measured and reported if chlorine is employed for disinfection of
the waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is
required, the permittee will complete the information located at the top of the aquatic toxicity (AT) test
form indicating the facility name, permit number, pipe number, county, and the month/year of the report
with the notation of "No Flow" in the comment area of the form. The report shall be submitted to the
Water Sciences Section at the address cited above.
Should the permittee fail to monitor during a month in which toxicity monitoring is required, then
monthly monitoring will begin immediately. Upon submission of a valid test, this monthly test
requirement will revert to quarterly in the months specified above.
Should any test data from either these monitoring requirements or tests performed by the North Carolina
Division of Water Resources indicate potential impacts to the receiving stream, this permit may be re-
opened and modified to include alternate monitoring requirements or limits.
NOTE: Failure to achieve test conditions as specified in the cited document, such as minimum control
organism survival and appropriate environmental controls, shall constitute an invalid test and will
require immediate follow-up testing to be completed no later than the last day of the month following
the month of the initial monitoring.
Page 4 of 8

Permit NCO083909
USE OF A DIFFERENT TEST ORGANISM
The permittee may request the use of a different test organism upon documentation that the alternate test
organism would provide an equal or greater level of protection and is appropriate based on the
characteristics of the discharge and receiving stream. Such documentation would consist of one of the
following:
1. For saltwater classified streams, a fathead minnow may be assigned as the acute testing species if
the salinity of the receiving stream at the point of discharge is <5 ppt throughout the tidally
influenced cycle. This determination may be based on the best professional judgment of DWQ
staff or data collection provided by the permittee and approved by DWQ staff. This evaluation
should include vertical profiles of salinity/conductivity measurements at both high tide and low
tide over several 24 hr cycles.
2. Three consecutive "side -by -side" tests with results indicating that the alternate test organism is as
or more sensitive to the facility's effluent. Each test series would consist of two separate toxicity
tests conducted on the same sample of effluent with the length of exposure specified by the permit,
the only difference between the tests being the organism used.
3. An alternate plan developed by the permittee and approved by the Aquatic Toxicology Unit that
demonstrates an equal level of protection is offered by the test organism.
For items 2 and 3, it must also be demonstrated that viable and standardized culture techniques are
available for that organism and standardized testing methodologies have been developed and
validated. This demonstration should meet guidance provided by EPA in Section 6 of EPA-821 -R-02-
0 12, Short Term Methods for Estimating the Acute Toxicity of Effluents and Receiving Waters to
Freshwater Organisms. Fifth Edition, 2002.
A. (3.) DISCHARGE ALTERNATIVES EVALUATION
The Permittee shall assess potential alternatives to eliminate Whole Effluent Toxicity (WET) test failures.
This evaluation shall assess the feasibility of all the following alternatives.
1. Connect discharge to a WWTP: Determine whether the wastewater can be discharged to a wastewater
treatment plant. Approval or disapproval from the plant operator should be acquired.
2. Obtain a Non -discharge permit: Eliminate the surface water discharge by obtaining a non -discharge
permit for spray irrigation, infiltration, or subsurface disposal (on -site drainfield,
infiltration gallery, injection wells).
3. Install Wastewater Treatment: Install improved wastewater treatment to enable the facility effluent to
consistently pass the WET test. If this is not technically feasible or cost prohibitive,
please explain and provide estimated costs.
4. Use Alternative Water Treatment Source: Obtain drinking water from another source (nearest
County, City, or Town or other wells) so the discharge or toxicity problem is
eliminated.
5. Use Alternative Water Treatment Method: Install alternative and/or innovative water treatment
methods or operational improvements that do not produce toxic wastewaters. For
Page 5 of 8

Permit NCO083909
example, install a recycle iron/manganese filtration system with no discharge or
combine discharge with WWTP or cooling water effluents.
6. Discharge to a Larger waterbody/Perform a dilution model: Relocate the facility's discharge to a
larger receiving waterbody to eliminate or reduce toxic impacts to the receiving
waterbody given the increased dilution. If applicable, perform a dilution model to
receive allowance for stream dilution in WET test.
7. Combination of Alternatives: Employ any combination of the alternatives listed above that would
result in eliminating or decreasing toxicity until a more feasible solution becomes
available.
The evaluation shall include a present value of costs analysis for all technologically feasible options as
outlined in the Division's "Engineering Alternatives Analysis Guidance Document." This Document can be
found at: ho://portal.ncdenr.or web/wq/swp/ps/npdes/permits.
This evaluation is being requested to determine whether there are any economical and technologically
feasible alternatives available to the Permittee to address aquatic toxicity in the plant effluent. Based upon
the evaluation, please identify viable alternatives and present an implementation schedule and project
timeline for the preferred alternative. The Permittee shall submit the Discharge Alternatives Evaluation to the
Division along with the submission of their next permit renewal application (due 6 months prior to permit
expiration on December 31, 2022) to:
NC DENR / Division of Water Resources / Water Quality Permitting
NPDES, Wastewater Branch
1617 Mail Service Center, Raleigh, NC 27699-1617
A. (4.) ELECTRONIC REPORTING OF MONITORING REPORTS
[NCGS 143-215.1 (b)]
Federal regulations require electronic submittal of all discharge monitoring reports (DMRs) and program
reports. The final NPDES Electronic Reporting Rule was adopted and became effective on December
21, 2015.
NOTE: This special condition supplements or supersedes the following sections within Part H of this
permit (Standard Conditions for NPDES Permits):
• Section B. (11.)
• Section D. (2.)
• Section D. (6.)
• Section E. (5.)
Signatory Requirements
Reporting
Records Retention
Monitoring Reports
1. Repordna Requirements (Supersedes Section D. (2.) and Section E. (5.) (a)1
The permittee shall report discharge monitoring data electronically using the NC DWR's Electronic
Discharge Monitoring Report (eDMR) internet application.
Monitoring results obtained during the previous month(s) shall be summarized for each month and
submitted electronically using eDMR. The eDMR system allows permitted facilities to enter monitoring
Page 6of8

Permit NC0083909
data and submit DMRs electronically using the internet. Until such time that the state's eDMR
application is compliant with EPA's Cross -Media Electronic Reporting Regulation (CROMERR),
permittees will be required to submit all discharge monitoring data to the state electronically using
eDMR and will be required to complete the eDMR submission by printing, signing, and submitting one
signed original and a copy of the computer printed eDMR to the following address:
NC DEQ / Division of Water Resources / Water Quality Permitting Section
ATTENTION: Central Files
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
If a permittee is unable to use the eDMR system due to a demonstrated hardship or due to the facility
being physically located in an area where less than 10 percent of the households have broadband access,
then a temporary waiver from the NPDES electronic reporting requirements may be granted and
discharge monitoring data may be submitted on paper DMR forms (MR 1, 1.1, 2, 3) or alternative forms
approved by the Director. Duplicate signed copies shall be submitted to the mailing address above. See
"How to Request a Waiver from Electronic Reporting" section below.
Regardless of the submission method, the first DMR is due on the last day of the month following the
issuance of the permit or in the case of a new facility, on the last day of the month following the
commencement of discharge.
Starting on December 21, 2020, the permittee must electronically report the following compliance
monitoring data and reports, when applicable:
Sewer Overflow/Bypass Event Reports;
Pretreatment Program Annual Reports; and
Clean Water Act (CWA) Section 316(b) Annual Reports.
The permittee may seek an electronic reporting waiver from the Division (see "How to Request a
Waiver from Electronic Reporting" section below).
2. Electronic Submissions
In accordance with 40 CFR 122.41(1)(9), the permittee must identify the initial recipient at the time of
each electronic submission. The permittee should use the EPA's website resources to identify the initial
recipient for the electronic submission.
Initial recipient of electronic NPDES information from NPDES-regulated facilities means the entity
(EPA or the state authorized by EPA to implement the NPDES program) that is the designated entity for
receiving electronic NPDES data [see 40 CFR 127.2(b)].
EPA plans to establish a website that will also link to the appropriate electronic reporting tool for each
type of electronic submission and for each state. Instructions on how to access and use the appropriate
electronic reporting tool will be available as well. Information on EPA's NPDES Electronic Reporting
Rule is found at: https•//www.federalregister.gov/documents/2015/10/22/2015-24954/national-
pollutant-discharge-elimination-s, g!gm-npdes-electronic-reporting-rule.
Electronic submissions must start by the dates listed in the "Reporting Requirements" section above.
3. How to Request a Waiver from Electronic Reporting
Page 7of8

Permit NCO083909
The permittee may seek a temporary electronic reporting waiver from the Division. To obtain an
electronic reporting waiver, a permittee must first submit an electronic reporting waiver request to the
Division. Requests for temporary electronic reporting waivers must be submitted in writing to the
Division for written approval at least sixty (60) days prior to the date the facility would be required
under this permit to begin submitting monitoring data and reports. The duration of a temporary waiver
shall not exceed 5 years and shall thereupon expire. At such time, monitoring data and reports shall be
submitted electronically to the Division unless the permittee re -applies for and is granted a new
temporary electronic reporting waiver by the Division. Approved electronic reporting waivers are not
transferrable. Only permittees with an approved reporting waiver request may submit monitoring data
and reports on paper to the Division for the period that the approved reporting waiver request is
effective.
Information on eDMR and the application for a temporary electronic reporting waiver are found on the
following web page:
bqp://dgg.nc.gov/about/divisions/Water-resources/edmr
4. Sinnatory Requirements [Supplements Section B. (11.) (b) and Supersedes Section B. (11.) (d)1
All eDMRs submitted to the permit issuing authority shall be signed by a person described in Part II,
Section B. (11.)(a) or by a duly authorized representative of that person as described in Part II, Section
B. (I 1.)(b). A person, and not a position, must be delegated signatory authority for eDMR reporting
purposes.
For eDMR submissions, the person signing and submitting the DMR must obtain an eDMR user account
and login credentials to access the eDMR system. For more information on North Carolina's eDMR
system, registering for eDMR and obtaining an eDMR user account, please visit the following web
page:
bgp://dgg.nc.gov/about/divisions/Water-resources/edmr
Certification. Any person submitting an electronic DMR using the state's eDMR system shall make the
following certification [40 CFR 122.22]. NO OTHER STATEMENTS OF CERTIFICATION WILL
BE ACCEPTED:
"I 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
fines and imprisonment for knowing violations. "
5. Records Retention [Supplements Section D. (6.)]
The permittee shall retain records of all Discharge Monitoring Reports, including eDMR submissions.
These records or copies shall be maintained for a period of at least 3 years from the date of the report.
This period may be extended by request of the Director at any time [40 CFR 122.41 ].
Page 8 of 8

Dare County
Rodanthe/Waves/Salvo Reverse Osmosis WTP
NPDES Permit NCO083909
Receiving Stream: Blackmar Gut Stream Class: SA; HQW
Stream Segment: 30-22-13 Sub -Basin N: 03-01-55
River Basin: Pasquotank HUC: 0301020515
County: Dare
N
A
SCALE
1:24,000
Facility Lo-at on
stale not sho
USGS Quad: Rodanthe

DEQ/DWR
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES PERMIT NCO083909
Facility
Information
Applicant/Facility Name:
Rodanthe Waves
Salvo Reverse Osmosis WTP
Applicant Address:
600 Mustian Street; Kill Devil Hills NC 27948
Facility Address:
23697 NCSR 12, Rodanthe, NC
Permitted Flow
N/A Potable design:
1.25 MGD; Backwash/reject design = 0.3 MGD
Type of Waste:
RO reject water
Facility/Permit Status:
PC-1; Renewal
County:
Dare County
Miscellaneous
Receiving Stream:
Blackmar Gut
Stream Classification:
SA, HQW
Subbasin:
03-01-55
Index No.
30-22-13
Drainage Area (mi2):
N/A
303(d) Listed?
Yes; Shellfish
Growing Area -
Prohibited (Fecal,
SH SA
Summer 7Q 10 cfs
Tidal
Regional Office:
Washington
Winter 7Q 10 cfs :
Tidal
USGSQuad:
Rodanthe
30 2 cfs
Tidal
HUC:
301020515
Average Flow cfs :
Tidal
Permit Writer:
Brianna Young
IWC % :
I IWC = 100%
Date:
12/14/17
BACKGROUND
Dare County operates a reverse osmosis -based drinking water treatment facility that serves the outer banks
communities of Rodanthe, Waves, and Salvo. Groundwater wells provide the raw water source. The facility
discharges reverse osmosis reject water via a submerged discharge adjacent to a seawall into Blackmar Gut,
a class SA, HQW water in the Pasquotank River Basin.
PROCESS
Well water is pumped from wells through replaceable cartridge filters followed by the addition of a non -
zinc based inhibitor, and continues through a reverse osmosis unit. Reject wastewater from the reverse
osmosis unit is constantly discharged to remove the concentrated solids through a submerged pipe adjacent
to a seawall into Blackmar Gut, which flows into Pamlico Sound. No other chemical additives of
significance are used in this part of the process prior to discharge.
HISTORY
This facility was original permitted in 1994 and has not been expanded nor changed its primary operation
since receiving its original NPDES permit. In 1994 the HQW class did not exist and was not applicable
until after 1995. The current discharge is into a class SA, HQW receiving stream. As a non -modeled tidal
discharge the instream waste concentration (IWC) is defined as 100%.
No obvious compliance concerns from March 2012 through May 2017 (frequency violations present; no
limit violations).
PERMITTING STRATEGY
Reasonable Potential Analysis (RPA)
The Division conducted EPA -recommended analyses to determine the reasonable potential for toxicants to
be discharged by this facility into SA waters (full WQS values), based on DMR data from October 2012 to
April 2017, applying the IWC of 100%.
Fact Sheet
NPDES NCO083909
Page 1 ot'3

Applying current WTP Strategy
Ammonia Nitrogen concentrations ranged from 1.3 mg/L to 17.7 mg/L, averaging 9.59 mg/L. Per 2012
WTP strategy, ammonia nitrogen monitoring maintained at monthly. Total fluoride monitoring not added
as there is no saltwater standard for fluoride. Total Iron monitoring not added as there is no saltwater
quality standard for iron. Temperature monitoring removed per the 2012 WTP guidance.
SUMMARY OF CHANGES FROM PREVIOUS PERMIT TO DRAFT:
• Added regulatory citations
• Updated outfall map
• Added eDMR language in A(1) and added Section A(4) for eDMR requirements
• Updated address on cover sheet and supplement to permit cover sheet per permit application
• Added language on Supplement to Permit Cover Sheet to include stream information
• Updated language on Supplement to Permit Cover Sheet per 2012 WTP strategy
• Removed column from A(1) for weekly average limits, as no weekly limits imposed
• Per 2009 WTP guidance, added monitoring in A(1) for: TRC (with limit) and turbidity (monitor
only)
• Parameter codes updated for Ammonia Nitrogen (00610 to C0610), TN (00600 to C0600), and
TP (00665 to C0665)
• WET testing updated to state Monitor & Report per 2012 WTP strategy
• Footnote for WET testing updated — removed "The collection of samples shall coincide with the
sampling of other parameters" as no longer necessary
• Removed monitoring for Total Cadmium, Total Chromium, Total Cyanide, Total Lead, Total
Mercury, and Total Silver, as there were no detects based on RPA and they are not POCs for RO
per 2009 WTP strategy
• Removed limits for Total Selenium and monitoring reduced to quarterly based on RPA
• Limits added for Total Nickel and Total Zinc based on RPA and monitoring increased to monthly
• Total Arsenic limits changed to 5 µg/L based on RPA
• Updated acute toxicity language in A(2)
• Added condition after effluent table in A(1) stating "All samples collected should be from a
representative discharge event" per current NPDES permit guidelines
• Added special condition A. (3) for discharge alternatives evaluation since failing toxicity tests
(failed 0 of last 4 and 5 of last 12)
SUMMARY OF CHANGES FROM DRAFT TO FINAL:
• RPA changed to reflect waters as not HQW — stream classification postdates discharge therefore
the HQW classification does not apply to RPA (per last issued permit in 2010)
• Based on rerun RPA (not HQW) limits changed for: Total arsenic, total nickel, and total zinc
LANGUAGE FOR COVER LETTER:
Please note that the receiving stream is listed as an impaired waterbody on the North Carolina 303(d)
Impaired Waters List. Addressing impaired waters is a high priority with the Division, and instream data
will continue to be evaluated. If there is noncompliance with permitted effluent limits and stream
impairment can be attributed to your facility, then mitigative measures may be required.
Whole Effluent Toxicity test results submitted during the past three years have demonstrated that the
Water Treatment Plant's effluent is showing potential for causing aquatic toxicity in the receiving
stream. As a result, the Rodanthe/Waves/Salvo RO WTP shall perform a Discharge Alternatives
Evaluation as described in Section A. (3) of this permit. This evaluation is being requested to determine
whether there are any economical and technologically feasible alternatives available to the
Rodanthe/Waves/Salvo RO WTP to comply with all NC Water Quality Standards. The permittee will be
given approximately one permit cycle to evaluate and document possible treatment/discharge alternatives
to eliminate aquatic toxicity. The evaluation shall be submitted with the permittee's next permit renewal
Fact Sheet
NPDES NCO083909
Page 2 of 3

application and will be carefully reviewed by the Division and the results will be used in the development
of a compliance schedule or possible variance request for the Rodanthe/Waves/Salvo RO WTP.
NPDES DIVISION CONTACT
If you have questions regarding any of the above information or on the attached permit, please contact
Brianna Young at [phone] or email [e-mail].
REGIONAL OFFICE COMMENTS (VIA EMAIL 10/18/17)
No comments.
DMF COMMENTS (VIA EMAIL 10/18/17)
No comments.
COMMENTS FROM PATRICK IRWIN (DARE COUNTY; VIA EMAIL 10/25/17)
• Monitoring and limits for TRC — WTP does not use chlorine in any phase of raw or concentrate
stream; request that TRC limit not be written in monitoring requirements for clarity; submitted
2003 letter from Division that TRC footnote and monitoring requirement removed "in
consideration of the fact that Dare County does not chlorinate above the reverse osmosis unit."
o DWR response: As stated during our phone call on December 14, 2017, monitoring and
the footnote for Total Residual Chlorine in Section A. (1) will remain in the permit. The
limit is dictated by the receiving stream; however, monitoring and compliance are only
required if chlorine or chlorine derivatives are added to water that is eventually
discharged.
• Limit change for Total Arsenic — Lowering the limit from 10 ug/L to 5 ug/L places the new limit
under the human health standard. Dare County is requesting that the limit for arsenic remain the
same since 10 ug/L is the human health standard and 50 ug/L is the aquatic life standard.
o DWR response: As stated during our phone call on December 14, 2017, after additional
review, the permit history indicates that the HQW classification was not applied in the
previous 2010 permit renewal, stating that the permit and discharge predated the change
in surface water classification to HQW. Therefore, the data analysis for the current
renewal has been updated, changing the acute and chronic limits for total arsenic in
Section A. (1).
Discharge alternatives evaluation requirement — As part of the application process in 1993 for
permitting the concentrate discharge Dare County hired Black & Veatch to complete the water
system environmental assessment that included an alternative analysis report. Dare County
believes that another Discharge Alternatives Analysis Report is redundant as it is based on the
"potential" of aquatic toxicity in the receiving stream as there have not been any toxicity failures
since July 2016; submitted 1993 alternative analysis
o DWR response: As stated during our phone call on December 14, 2017, the Discharges
Alternatives Evaluation requirement will remain in the permit. This evaluation is due to
the Division six (6) months prior to permit expiration.
Fact Shco
NPDES NCO083909
Page 3 of 3

Table 1
Facility Name
W WTPIWTP Class
NPDES Permit
Outfall
Flow, Ow (MGD)
Receiving Stream
Stream Class
7Q10s (cfs)
7Q10w (cfs)
30Q2 (cfs)
QA (cfs)
1 Q10s (cfs)
Data Source(s)
Saltwater RPA 95% Probablity/95% Confidence
MAXIMUM DATA POINTS = 58
REQUIRED DATA ENTRY
act Information Table 2. Parameters of Concern
❑CHECK IF HQW OR ORW WQS
Rodanthe/Waves/Salvo RO WTP
PC-1
NC0083909
001
0.188
Blackmer Gut
SA, HQW
Tidal, IWC = 100%
Empal. IWC - 100%
Tidal, IWC = 101
Tidal, IWC = 100%
Tidal, IWC = 100%
Saltwater streams are tidal resulting in all IWC %= 100%.
If an approved model is conducted then a chronic dilution
factor is determined and can be applied to a discharge to
calculate its IWC %. If a stream is classed as a SA or
ORW then its is also classified as a HQW. The appropriate
IWC °% must be defined to property calculate WQS-based
Perot
Par02
Par03
Par04
Para6
Par06
Parel
Par08
Par08
Part
Par11
Par12
Parl3
Parib
Paris
Par16
Part'!
Par18
Parts
Par20
Par21
Par22
Name wos Type Chronic Modifier Acute PQL Units
Arsenic
Aquatic Life
C
36
SW
69
ug/L
Arsenic
Human Health
C
10
HH
ug/L
Cadmium
Aquatic Life
NC
8.9
SW
40.2
ug/L
Total Phenolic Compounds
Aquatic Life
NC
300
A
10
ug/L
Chromium A
Aquatic Life
NC
50.4
SW
1107.8
ug/L
Chromium, Total
Aquatic Life
NC
N/A
SW
N/A
ug/L
Copper
Actuate Life
NC
3.7
SW
5.8
ug/L
Cyanide
Aquatic Life
NC
1
SW
1
10
ug/L
Lead
Aquatic Life
NC
8.5
SW
220.8
ug/L
Mercury
Aquatic Life
NC
25
SW
0.5
n9tL
Molybdenum
Human Health
NC
2.0
HH
mg/L.
Nickel
Aquatic Life
NC
8.3
SW
74.7
ug/L
Selenium
Aquatic Life
NC
71
SW
ug/L
Silver
Aquatic Life
NC
0.1
SW
2.2
ug/L
Zinc
Aquatic Life
NC
85.6
SW
95.1
ug/L
NOTE: The aquatic life chronic and acute WQS for several metals are calculated based on EPA wriversi
see "Diss. SW stds. As TM" for more details and summary of calculated WQS..
NC0083909_ Final 9595 SALTWATER RPA w_diss factors 20167a,input
12/14/2017

REASONABLE POTENTIAL ANALYSIS - DATA
Arsenic
Va"'® ""'COPt''
Merlmum tl+m poim+
a 58
Cadmium
Date
Data
BDL-112DL
Results
Date
Data
BDL=I2DL
1117=12
10
5
Std Dw
0A584
1
10/2/2012
5
2.5
11/6M12
10
5
Mean
4.8909
2
1/72013
10
5
12/4/2012
<
10
5
C.V.
0.0937
3
402013
<
10
5
1/7/2013
<
10
5
n
55
4
7/9/2013
5
2.5
2/5/2013
10
5
5
10/82013
<
5
2.5
3/4/2013
<
10
5
Mull Factw =
1.0000
6
1/14/2014
<
10
5
4/2/2013
10
5
Me.. Value
5.0 ugVL
7
4111=4
5
2.5
57/2013
10
5
Max. Prod Ow
5.0 ugll.
8
7/2/2014
<
10
5
6/42013
10
5
9
1022014
c
10
5
722013
10
5
10
4712015
<
10
5
8172013
<
10
5
11
7/14/2015
<
10
5
9/112013
<
10
5
12
10/6=15
<
2
1
IDWX13
<
10
5
13
V12/2016
<
5
2.5
11/52013
3
3
14
4/42016
<
5
2.5
1229/2013
<
10
5
15
715=16
5
2.6
1/142014
<
10
5
16
10/42016
<
2
1
2W2014
<
10
5
17
1/102017
<
5
2.5
342014
3
3
18
4/42017
c
10
5
41WM14
10
5
19
SWM14
<
10
5
20
6/3/2014
3
3
21
7=14
10
5
22
8/122014
<
10
5
23
9=14
10
5
24
10/72014
<
10
5
25
11/42014
<
10
5
26
1=2014
<
10
5
27
1/6/2015
<
10
5
28
2JI012015
<
10
5
29
311012M5
<
10
5
30
422015
<
10
5
31
5/8/2015
10
5
32
6AV2015
<
10
5
33
7/14/2015
<
10
5
34
3112015
<
10
5
35
9/8/2015
10
5
36
law"15
<
10
5
37
11/10/2015
<
10
5
38
12/8/2015
<
10
5
39
1/121016
<
10
5
40
222016
<
10
5
41
3112016
10
5
42
4/4/2016
10
5
43
5/1012016
<
10
5
44
6/142016
<
10
5
45
7/512016
10
5
46
8/11/2016
<
10
5
47
9/62016
10
5
48
10/42016
<
10
5
49
11/8/2016
<
10
5
60
121NO16
<
10
5
51
1/10/2017
<
10
5
52
222017
<
10
5
53
372017
10
5
54
414M17
<
10
5
55
56
57
58
m+am�m aem t�om.� Chromium, Total
Rasult I. _—
Std Dw 1.5038
Mean 3.4444
C.V. 0.4366
n 18
Mult Factor 1.3000
Max. Valle 5.00 ugA.
Mac. Fed Ow O DETECTS ug/L
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Date
Data
BDL=1/2DL
10/2/2012
<
20
10
1/712013
<
10
5
4MM13
10
5
7/9/2013
<
10
5
10/8/2013
<
10
5
1/14/2014
<
10
5
4/8/2014
<
10
5
7/ 2014
<
10
5
10/72014
<
10
5
42/2015
10
5
7/142015
<
10
5
10/61ZD15
<
10
5
1/12/2016
<
10
5
4/4/2016
10
5
7/32016
<
10
5
10/42016
<
10
5
1/10/2017
<
10
5
4/42017
<
10
5
Result
Std Dw. 1.1785
Mean 5.2778
C.V. 0.2233
n 18
Mull Factor = 1,1500
Max. Value 10.0 uryL
Max. Pred Cw O DETECTS u94
Date
101=12
1/712013
4/22013
M12013
10/8/2013
1/14/2D14
4MM14
72/2014
107/2014
47/2015
7/1412015
10/6/2015
1/12/2016
4142016
7152016
10/4/2016
1/10/2017
4/42017
N00083909_ Rml 9595 SALTWATER RPA w_diss fagws 20167a,data
Date}

Cc per
vw:m nn-co
Melmum deb poml.
•4a
Data
BDL-1120L
Results
<
20
10
Ste Oev.
1.1785
<
10
5
Mean
Unit
10
5
C.V.
0.2233
<
10
5
n
18
10
5
<
10
5
Mull Factor =
1.1500
<
10
5
Max. Vain
10.00 ug/L
<
10
5
Max. Fred Cw
O DETECTS ug1L
<
10
5
10
5
10
5
<
10
5
10
5
10
5
10
5
10
5
10
5
10
5
REASONABLE POTENTIAL ANALYSIS - DATA
Cyanide
nee. mom mb pwllb
=58
Date
Data
BDL-112DL
Resulb
1
1012/2012
<
5
5
Sol De,
0.0000
2
I 2013
5
5
Mean
5.0000
3
4MM13
<
5
5
C.V.
0.0000
4
M2013
5
5
n
19
5
10/8/2013
<
5
5
6
1/14/2014
<
5
5
Mull Factor =
1.0000
7
4/S/2014
<
5
5
Max. Value
5.0 u91L
8
7/2/2014
5
5
Max. Pred Cw
0 DETECTS u91L
9
W12014
<
5
5
10
4/7/2015
<
5
5
11
7/14/2015
<
5
5
12
10/6/2015
<
5
5
13
1/12MD16
<
5
5
14
4141ZD16
<
5
5
15
7/sMI6
5
5
16
8/11/2016
<
5
5
17
10/4/2016
<
5
5
18
1/10/2017
<
5
5
19
4/412017
<
5
5
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
41
48
49
50
51
52
53
54
55
56
57
58
Lead
vr"®
Mnlmum Nb polnla
=w
Date
Data
BDL=112DL
Results
Data
Data
1
10/2/2012
<
15
L5
Std Dev.
0.5893
1
1OWM12
<
0.5
2
lf7/2D13
<
10
5
Mean
5.1389
2
177/2013
<
0.5
3
4/2/2013
10
5
C.V.
0.1147
3
4MM13
<
0.5
4
719/2D13
<
10
5
n
18
4
719/2013
0.5
5
10/812013
10
5
5
10/8/2013
0.5
6
1/14/2014
<
10
5
Mult Facto =
1.07
6
1/14/2014
<
0.5
7
4/8/2014
10
5
Max. Value
7.50 ug/L
7
4/8/2014
2
8
7/2/2014
<
10
5
Max. Fred Cw
O DETECTS ug1L
8
7/7/2014
<
2
9
10/7/2014
<
10
5
9
101=14
<
1
10
4/712015
10
5
10
4/7/2015
<
0.5
11
7/14/2015
<
10
5
11
7/14/2015
<
2
12
10/6/2015
<
10
5
12
10/612015
<
05
13
1/12/20/6
<
10
5
13
1/12/2016
<
2
14
4/4/2016
10
5
14
4/4/2016
2
15
715=16
<
10
5
15
7/5/2016
2
16
10/4/2016
<
10
5
16
10/4/2016
<
4
17
1/10=17
<
10
5
17
1/10/2017
10
18
4/4/2017
<
10
5
18
4/4/2017
<
0.5
19
19
20
20
21
21
22
22
23
23
24
24
25
25
26
26
27
27
28
28
29
29
30
30
31
31
32
32
33
33
34
34
35
35
36
36
37
37
38
38
39
39
40
40
41
41
42
42
43
43
44
44
45
45
46
46
48
48
49
49
50
50
51
51
52
52
53
53
54
54
55
55
56
56
57
57
58
58
NC0083909_ Final 9595 SALT WATER RPA w_diss factors 20167a,data
Dale)

Mercury
BDL=1/2DL
0.25
0.25
0.25
0.25
0.25
0.25
1
1
0.5
0.25
1
0.25
1
1
1
2
5
0.25
n 4xu
a 5a
Results L
Ste Dev. 1.1384
Mean 08750
C.V. 1.3010
n 18
Mult Fedor= 1.8600
Max. Value 5.0 ng/L
Mex. Pred 0x 0 DETECTS ng/L
REASONABLE POTENTIAL ANALYSIS - DATA
Nickel
Date
Data
BDL=112DL
10=012
<
5
2.5
1/7/2013
39
39
4=13
27
27
7l9/2013
43
43
10/82013
64
64
1/142014
52
52
4/82014
72
72
71=14
56
56
102/2014
<
10
5
4/7(2D15
<
10
5
7/14=15
36
36
10OMS
36
36
1/122016
39
39
4/412016
31
31
715=16
<
5
2.5
10/42016
12
12
1/102017
13
13
4/42017
13
13
M..Imuta data ommd
=50
Results
Sid Dev.
21.9008
Mean
30.4444
C.V.
0.7194
n
18
Mull Factor =
1.4900
Max. Value
72.00 ug/L
Max. Pred Ow
107.28 ug/L
Selenium
vnwm'men'Co`Z
M-1—data rolnn,
a 00
Date
Data
BDL-1120L
Reaults
10/2/2012
<
20
10
Sid Dev.
1.9878
11/6/2012
<
10
5
Main
5.5818
12/42012
<
10
5
C.V.
0.3561
1/72013
10
5
n
55
2/5/2013
10
5
314/2013
10
5
Mult Factor
1.0100
4/2/2013
10
5
mm. Value
16.0 ug/L
67/2013
10
5
Max. Pura Cw
16.2 ug/L
6/42013
<
10
5
7MI2013
<
10
5
8/72013
<
10
5
9/112013
<
10
5
10/82013
<
10
5
11/62013
11
11
1ZWM13
<
10
5
1/142014
<
10
5
2/32014
<
10
5
3/4=14
16
16
4/8/2014
<
10
5
5162014
<
10
5
632014
10
10
71=14
10
5
8/122014
<
10
5
9IM14
10
5
1072014
<
10
5
11/42014
<
10
5
12/32014
<
10
5
1/62015
<
10
5
2//02015
<
10
5
3/MMS
<
10
5
4/7/2015
<
10
5
502015
<
10
5
632015
10
5
7/142015
<
10
5
81112015
<
10
5
911112M
10
5
10/6/2015
<
10
5
11/102015
<
10
5
12/82015
<
10
5
1/12/2016
<
10
5
2/2/2016
10
5
3M2016
<
10
5
4/42016
10
5
51102016
<
10
5
6/14/2016
<
10
5
7/52016
10
5
8/11/2016
<
10
5
9/62016
10
5
1014I2016
c
10
5
11/8/2016
<
10
5
12/62016
<
10
5
1/102017
10
10
2172017
10
5
3/72017
<
10
5
4/42D17
<
10
5
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
25
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Silver
Date
Dara
BDL-112DL
10/22012
<
20
10
1/7/2013
10
5
4/22013
<
10
5
7MM13
<
10
5
10/82013
<
10
5
1/14/2014
10
5
4182014
<
10
5
7IV2014
<
10
5
10172014
<
10
5
42/2015
<
10
5
7/142015
<
10
5
10/6/2015
<
10
5
1/122016
<
10
5
4/4/2016
<
10
5
TIMMS
10
5
10/42016
<
10
5
1/102017
<
10
5
4142017
<
10
5
NC0083909_ FMal 9595 SALTWATER RPA w_diss factors 20167a,date
Date}

Results
Sta Dev. 1.1785
Mean 5.2778
C.V. 0.2233
n 18
Mull Factor = 1.1500
Max. Value 10.00 u9/L
Max. Prod Cw 10 DETECTS ug/L
48
49
50
51
52
53
64
55
56
57
58
Date
10=012
1n/2013
422013
7r9/2013
10/82013
1/142014
4/8/2014
7/2/2014
10772014
4/7/2015
7/142015
10/6/2016
1/12/2016
4/4/2016
7/&2018
10/42016
1/102017
4142017
Data
BDL=I2DL
20 10
10 5
10 5
10 5
99 99
10 5
10 5
10 5
10 5
10 5
10 5
10 5
10 5
10 5
10 5
10 5
10 5
10 5
REASONABLE POTENTIAL ANALYSIS - DATA
o curs points
-38
Results I
Ste Dev. 22A 180
Mean 10.500D
C.V. 2.1065
n 18
Mull Factor = 2.2500
Max. Value 99.0 uq/L
Max. Prea Ow 222.8 tg/L
NC0063909 Final 9595 SALTWATER WA w ass factors 2D167a.data
Dale)

Rodanthe/Waves/Salvo RO WTP
NCO083909 Saltwater RPA 95% Probablity/95% Confidence
MAXIMUM DATA POINTS = 58
Qw (MGD) = 0.19
1QI0S (cfs) = Tidal, IWC =100%
7QIOS (cfs)= Tidal, IWC = 100%
7QI0W (cfs) = Tidal, IWC = 100%
30Q2 (cfs) = Tidal, IWC = 100%
Avg. Stream Flow, QA (cfs) = Tidal, IWC = 100%
Receiving Stream: Blackmar Gut
WWTP/WTP Class: PC-1
fWC% Q IQ10S = 100
IWC% Q 7QIOS= 100
IWC%Q7QIOW= 100
RVC% @ 30Q2 = 100
IWC%Q QA= 100
Stream Class: SA, HQW
Outfall 001
Qw = 0.188129 MGD
PARAMETER
TYPE
NC STANDARDS OR EPA CRITERIA
12
REASONABLE POTENTIAL RESULTS
(1)
RECOMMENDED ACTION
Applied
Chronic Acute
0
1l # Det. Max Prod Cw Allowable Cw
Standard
Acute (SW): 69.0
Arsenic
C
36 SW(7QIOs) 69
ug/L
_
55 3
5.0No
value value> Allowable Cw
Arsenic
C
10 HH(Qavg)
ug/L
Chronic (HH): 10.0
No RPA, Predicted Max 2 50% of Allowable
No value > Allowable Cw
Cw-apply Quarterly Monitoring
Acute: 40.20
No detects
Cadmium
NC
8.9 SW(7QIOs) 40.2
lip .
IS 0
NO DETECTS
_ -____ _
Chronic_8.90
____________________
Max h4 DI 10
Acute: 1,107.8
Chromium VI
NC
50.4 SW(7QIOs) 1107.8
ugfL
0 0
N/A
_ -.
--_________________
Chromium, Total
NC
ug/L
IS 0
NO DETECTS
a. No Monitoring required if all Total
Chromium samples are <the Chromium VI
Allowable Cw
Max MDL-20
Acute: 5.80
No detects
Copper
NC
3.7 SW(7QIOs) 5.8
ug/L
IS 0
NO DETECTS_
_
Chronic-----3.70------------------------------
Max MOIL =20
Acute: 1.0
No detects
Cyanide
NC
I SW(7QIOs) i
10.0
ug/L
19 0
NO DETECTS
_ --
'—'—'--------'—
Chronic------1.0
Acute: 220.80
No detects
Lead
NC
8.5 SW(7QIOs) 220.8
ug/L
18 0
NO DETECTS
_ _ _
Max MDL= 15
Acute: NO WQS
No detects
tdcrcury
NC
25 SW(7QIOs)
0.5
ng/L
18 0
NO DETECTS
_
Chronic-----25.0------------------------------
Max MDL= 10
Acute: 74.70
RPA for non -AL- apply Monthly Monitoring
Nickel
NC
8.3 SW(7QIOs) 74.7
ug/L
18 14
107.3
with Limit
_ _
14 values > Allowable Cw
Acute: NOWQS
No RPA, Predicted Mil 50%of Allowable Cw
Selenium
NC
71 SW(7QIOs)
ug/L
55 4
16.16
-No Monitoring required
NCO083909_ Final 9595 SALTWATER RPA w_diss factors 20167a,rpa
Page 1 of 2 121142017

Rodanthe/Waves/Salvo RO WTP
NCO083909 Saltwater RPA 95% Probablity/95% Confidence
Outfall 001
Qw = 0.188129 MGD
Chronic: 71.0
No value> Allowable Cw
Acute: 220
No detects
Siwcr
NC
0.1 SW(7QIOs) 2.2
ug/L
18 0
.VO DETEOS
_ _ _ _ _ _ __
Chronic: 0.10
_ _______________._ _ _ _
Max MDL = 20
Acute: 95.1
RPA - Apply Monthly Monitoring with Limit
Zinc
NC
85.6 SW(7QIOs) 95.1
ug/L
18 I
222.75
—
_ __
Chrouic:--—85.6--
_______________________ --
1 values > Allowable Cw
NC0083909_ Final 9595 SALTWATER RPA w_diss factors 20167a,rpa
Page 2 of 2 12/14/2017

COUNTY OF DARE
Kill Devil Hills, NORTH CAROLINA 27948
.�Y 71 F.
o �p
• �Y 1 A Y��\
Patrick Irwin
Assistant Utilities Director
October 25, 2017
Ms. Brianna Young
Division of Water Resources
WQ Permitting Section - NPDES
1617 Mail Service Center
Raleigh, NC 27699-1617
RE: NPDES Draft Permit #NC0083909
Rodanthe/Waves/Salvo Reverse Osmosis WTP
Class PC-1
Dare County
Dear Ms. Young,
600 Mustian St.
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
Dare County Utilities Department Staff has reviewed the Draft NPDES Permit
NCO083909 dated October 4, 2017 and has the following comments:
Monitoring and Limits for Total Residual Chlorine
The Rodanthe/Waves/Salvo Reverse Osmosis WTP does not use chlorine in any phase of
the raw or concentrate stream. Therefore we request that total residual chlorine level of
13 µg/I not be written into the monitoring requirements (for clarity). Attached is an
Issuance of NPDES Permit Letter from NCDENR dated July 31, 2003 stating: "The
footnote and monitoring requirement for total residual chlorine has been eliminated in
consideration of the fact that Dare County does not chlorinate above the reverse
osmosis unit." Attached is the July 31, 2003 document.
Limits Change for Total Arsenic
Lowering the arsenic limit from 10 µg/1 to 5 µg/I places the new limit under the human
health standard. Dare County is requesting that the limit for arsenic remain the same
since 10 µg/I is the human health standard and 50 µg/I is the aquatic life standard.

This is from the NCDEQ Web Page: State Regulators Clarify Reports on Ars anic Test
Results near Coal Ash Spill
"The aquatic life standards for arsenic (50 micrograms per liter) "ere
developed per EPA standards based on toxicity testing of fish and other
organisms that live in the waters. The human health standards (11) micrograms
per liter) were adopted to protect humans from exposures other :han drinking,
such as skin contact and fish consumption, also using EPA guidane e. Both the
aquatic life and human health standards are water concentrations; not to be
exceeded over time." https://deci.nc.pov ress-release state -re ilators-clarifv-
reports-arsenic-test-results-near-coal-ash-spill
Discharge Alternatives Evaluation Requirement
As part of the application process in 1993 for permitting the concentrate discharge Dare
County hired Black & Veatch to complete the Rodanthe-Waves-Salvo Wat( r System
Environmental Assessment that included an Alternative Analysis Report. C are County
believes that another Discharge Alternative Analysis Report is redundant a; it is based
on the "potential' of aquatic toxicity in the receiving the stream as there h ave not been
any toxicity failures since July 2016. Attached is the Alternative Analysis da ted January 3,
1993.
Thank you for your consideration in this matter.
If you have any questions, or need further information please let me know
Sincerely,
Patrick Irwin
Assistant Utilities Director
CC: Ken Flatt, Utilities Director
Charles Budd, ORC
RWS R.O. WTP

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
Michael F. Easley, Governor
William G. Ross, Jr., Secretary
Alan W. Klimek, PE, Director
July 31. 2003
Mr. Billy Brown
Dare County
600 Musttan Street
Kill Devil Hills, North Carolina 27948
n
•01 ��
NCDENR
NORTH CAnouNA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Subject: Issuance of NPDES Permit NCO083909
Rodanthe. Waves, Salvo R.O. WTP
Dare County
Dear Mr. Brown:
Division of Water Quality (Division) personnel have reviewed and approved your application for
renewal of the subject permit Accordingly, we are forwarding the attached NPDES discharge permit,
This permit is Issued pursuant to the requirements of North Carolina General Statute 143-215.1 and
the Memorandum of Agreement between North Carolina and the U.S. Environmental Protection
Agency dated May 9, 1994 (or as subsequently amended).
In consideration of your comments, the following changes have been made:
• The limit for cyanide has been eliminated and the monitoring has been reduced to
quarterly. In reviewing the data, all samples were below detection level, eliminating the
need for a limit.
• The limit for chromium has been eliminated and the monitoring has been reduced to
quarterly. Incorrect criteria were applied during the reasonable potential analysis. The
new analysis does not Indicate reasonable potential to exceed water quality criteria.
—� • The footnote and monitoring requirement for total residual chlorine has been eliminated In
consideration of the fact that Dare County does not chlorinate above the reverse osmosis
unit.
• In consideration of the physical constraints for upstream sampling, that point has been
moved to 27 feet north of the OUtfall pipe. Should you wish to suggest an east -west
configuration for instream sampling, please do so.
The selenium limit and monitoring must remain In the permit as a daily maximum. This is per
a stipulation from EPA Region IV, which reviews and approves all of North Carolina's NPDES permits.
Implementation of monthly average limits will be considered once Dare County has completed dilution
modeling for the Rodanthe, Waves, Salvo R.O. WTP discharge. It is very strongly recommended that
you perform this modeling, as the Division Is considering requiring It of all tidal WTP discharges. If
you have any questions about the manner In which metals criteria are derived, please contact Connie
Brower at [phone] ext. 572.
In addition, the water treatment plant report that you requested Is enclosed along with your
new permit. It contains updated permitting strategies for discharges from membrane and Ion
exchange water treatment facilities.
If any parts, measurement frequencies or sampling requirements contained in this permit are
unacceptable to you, you have the right to an adjudleatory 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 flied with the Office of
1617 Mail Service Center. Raleigh, North Carolina 27699-1617 Telephone [phone] FAX [phone]
An Equal Opportunity Alllnnative Action Employer VISITUS ON THE INTERNEY @ hilpJR12o.enr.slale.nc.usINPDES

Administrative Hearings (6714 Mall Service Center. Raleigh, North Carolina 27(199-6714). Unless
such demand Is made, this decision shall be final and binding.
Please note that this permit Is not transferable except after notice to the Division. The Division
may require modification or revocation and relssuance of the permit. This permit Idoes not affect the
legal requirements to obtain other penults which may be required by the Division )r Water Quality or
permits required by the Division of Land Resources, the Coastal Area Managemei d Act or any other
Federal or Local governmental permit that may be required.
If you have any questions concerning this permit, please contact Natalie lilerra at telephone
number [phone], extension 551.
Sincerely.
ORION, SIGNED `)
SUSAti A
Alan W. Klimek. PG
cc: Central Files
Washington Regional OMee/Water Quality Section
NPDCS Unit
Technical Assistance & Certification Unit
Aquatic Toxicology Unit
Division of Marine Fisheries
US Fish and Wildlife Service
Division of Coastal Management
DCH, Shellfish Sanitation
Connie Brower. DWQ Planning Branch
Bob Oreskovltch. Dare County
Ed Lawler - Hobbs. Upchurch & Associates. P.A.
2522 S. Croatan Highway, Suite 2A
Nags Head. North Carolina 27959

BLACK & VEATCH
110 West Walker Avenue, Asheboro, Norih Carolina 27204-0728, [phone], Fax: [phone]
Dare County B&V Project 24420
Blackmar Gut RO Water Treatment B&V File F
NPDES Permit Application- January 3, 1993
NPDES Permit No. NCO083909
NC Department of Environment,
Health and Natural Resources
Division of Environmental Management
P.O. Box 29535
Raleigh, North Carolina 27626-0535
Attention: Mr. Randy Kepler
Gentlemen:
This is in response to your correspondence of December 9, 1993 to
Terry Wheeler, Dare County Manager, regarding NPDES Permit No.
NC0083909. In this correspondence other information, consisting of an
Alternative Analysis Report, was requested.
The Alternative Analysis consists of the evaluation of three non -
discharge alternatives for waste water. These are: (1) Connection to an
existing sewerage system; (2) Subsurface disposal system; (3) Spray
irrigation system. The reject water from membrane treatment of brackish
water consists of the same constituents as in the raw ground water. The
only difference is they are concentrated about four times since the
recovery of demineralized water is 75% of the raw water. In the case
of discharge to Blackmar Gut, the water being discharged will have a
total dissolved solids content of approximately 7-8,000 ppm. The TDS of
raw water is currently 1,500 ppm, and the plant design is based upon the
TDS increasing over time to 8,000 ppm.
Response to the three non -discharge alternatives is as follows:
(1) Connection To An Existing Sewerage System - There are no
existing systems in the three villages that can accommodate
this reject water, and if so, a normal biological plant would
not reduce the TDS -.only dilute it.
(2) Subsurface Disposal System - This would necessarily consist
of the water going back into either the surf i c i a l aquifer or
a deeper aquifer that has a TDS equal to or greater than
8,000 ppm. Currently the Ground Water Division of DEHNR does

Paa6 2
NC Department of Environment, B&V Project 24,
Mr. Randy Kepler January 3, 1!
not allow deep well injection, and if it were discharged to
the surficial aquifer it would raise the TDS to an
undesirable level.
(3) Spray Irrigation System - Spray irrigation would essentiall
return the water to the surficial aquifer. This would in
turn raise the TDS to an undesirable level.
Currently Dare County has two NPDES Permits to discharge RO reject wa-
from the treatment plant at Kill Devil Hills. Also, the Ocracoke
Sanitary District has a permit to discharge RO reject water to the
Pamlico Sound. The TDS of Pamlico Sound, in vicinity of Blackmar Gut
varies seasonally between 14,000 and 17,000 ppm.
Should you have questions please give me a call at [phone] or
[phone].
Very truly yours,
BLACK & VEATCH
Joseph E. Hardee
jph
cc: Mr. Terry Wheeler
Mr. Bob Oreskovich
Mr. Bill Bizzell
Mr. John Hendrick
r

".... 10-0, 11 r.
Public Notice
North Carolina ;
Enviroomontal Management '(
CommissionlNPDES Unit
1617 Mail Service Center
Raleigh, NC 27699.1617 a
Notice of Intent to Issue a NPDES
II Wastewater Permit
The North Carolina Environmental
Management Commission proposes to
issue a NPDES wastewa
r is
on(listed belowe
permit to the perss) the
Wntten comments regarding
proposed permit will
ublishcdato of this
30 days after the p
notice. The Director ofurhNeR) maYholin
d
of Water Resourceshoultl there be a
a public hearing ublic infol' a-
sgnificent degree of p ,
Please mail comments andlor informa-
tion requests to UWR at the above
address. Interested persons may visit
the DWR at 512 N. Salisbury Street, I
Raleigh, NC to review information on i
fiIa. Atldilional information onhc found
permda and this notice :/I denc ovl
on our wa sit httpllq. 9
ahouUdivisionslwater-re source slwaler-
resournzs-permitslwastewater-
bronchlnpdes- wastewaterlpublic-
nolices, or by calling [phone].
Cunituck County has applied to modify
its NPDES permit (NC006 a er f°stem
Sout em Outer Ban to WheNlantic
WTP dching
isarg
Ocean. This modification allows .an
expansion of he filler backwasth
discharge to 1.3 MGD. Dare County
ls
(600 Mushan Shei 'Ifore,e e1lwatNOf
27948) has apP
NPDES for the
permit NC0063909
Rodant helWaveslSalvo Reverse Oss
mosis WfP in Dare County.
permitted facility Gul discharges in ashte-
water to Blackmar
Pasquotank River Basin water
arsenic, zinc, and nickel
quality limited. This discharge may
affect future allocations in this portion
of the Pasquotank River Basin, 10 11c

Young, Brianna A
From:
Sent:
To:
Cc:
Subject:
Attachments:
No comments on this permit
Thanks,
Bullock, Robert
Wednesday, October 18, 2017 11:04 AM
Young, Brianna A
Tankard, Robert
FW: Draft NPDES permit for Rodanthe/Waves/Salvo RO WTP (NC0083909) submitted
for public notice
Draft NPDES Permit NC0083909.pdf
Robbie Bullock
Senior Specialist
Division of Water Resources
Water Quality Regional Operations
252-948-3843 office
Robert.e.bullock(d)ncdenr.ciov Email
943 Washington Square Mall
Washington NC 27889
Email correspondence to and from this address is subject to the
North Carolina Public Records Law and may be disclosed to third parties.
From: Tankard, Robert
Sent: Wednesday, October 18, 2017 10:18 AM
To: Bullock, Robert <[e-mail]>
Subject: FIN: Draft NPDES permit for Rodanthe/Waves/Salvo RO WTP (NC0083909) submitted for public notice
Robbie, thanks for reviewing.
From: Young, Brianna A
Sent: Tuesday, October 03, 2017 5:19 PM
To: Tankard, Robert <[e-mail]>
Subject: Draft NPDES permit for Rodanthe/Waves/Salvo RO WTP (NC0083909) submitted for public notice
Good afternoon Robert,
Please find attached the draft permit for Rodanthe/Waves/Salvo RO WTP (NC0083909) that is being submitted to public
notice this week. Please provide any comments by November 3rd
Thank you,

Brianna Young
Environmental Senior Specialist
Division of Water Resources
N.C. Department of Environmental Quality
Office: 919-807-6333
Brianna.Young()ncdenr.gov
Mailing address:
1617 Mail Service Center
Raleigh, NC 27699-1617
Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed
to third parties.

Young, Brianna A
From: Potts,1
Sent: Monday, October 16, 2017 9:27 AM
To: Young, Brianna A
Subject: RE: Draft NPDES permits
Hi Brianna,
We have no comments for the following:
Rodanthe/Waves/Salvo RO WTP (NC0083909)
Dixon WTP (NC0083551)
Bogue Banks WTP (NC0083089)
Thanks for the opportunity to review.
J. D. Potts
Manager, Recreational Water Quality Program
Shellfish Sanitation and Recreational Water Quality
Division of Marine Fisheries
Department of Environmental Quality
[phone] office
[phone] fax
i.d. oottsCa�ncd e n r. pov
PO Box 769
5285 Hwy 70 West
Morehead City, NC 28557
`Nothing Compares
C.-
Email correspondence to and from this addre subject to the
North Carolina Public Records Law and may be disclosed to third parties.
From: Young, Brianna A
Sent: Tuesday, October 03, 2017 6:12 PM
To: Potts, J <[e-mail]>; Ethridge, Mark <[e-mail]>
Subject: Draft NPDES permit for Bogue Banks WTP (NC0083089) out to public notice
Good afternoon,
Please find attached the draft permit for Bogue Banks WTP (NC0083089) that is being submitted to public notice this
week. Please provide any comments by November 31

Thank you,
Brianna Young
Environmental Senior Specialist
Division of Water Resources
N.C. Department of Environmental Quality
Office: 919-807-6333
Bria n na. You ng (a. ncden r.gov
Mailing address:
1617 Mail Service Center
Raleigh, NC 27699-1617
Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed
to third parties.

Table 1.
Facility Name
WWTPIWTP Class
NPDES Permit
Outfall
Flow, Qw (MGD)
Receiving Stream
Stream Class
7Q10s (cfs)
7Q10w (cfs)
30Q2 (cfs) "
QA(cfs)
1Q10s (cfs)
Data Source(s)
Saltwater RPA 95% Probablity/i Confidence
MAXIMUM DATA POINTS = 58
REQUIRED DATA ENTRY
act Information Table 2. Parameters of Concern
❑� CHECK IF HQW OR ORW WQS
Rodanthe/Waves/Salvo RO WTP
P41
NCO083909
001
0.188
Blackmar Gut
SA, HQW
Tidal, IWC = 100%
_ Tidal, IWC = 100%
F Tidal, IWC = 100%
Tidal, IWC = 100%
Tidal, IWC = 100%
vater streams are saat resumng in an five %u = iuu%.
approved model is conducted then a chronic dilution
r is determined and can be applied to a discharge to
date its IWC %. If a stream is classified as a SA or
/ then its is also classified as a HQW. The appropriate
% must be defined to properly calculate WQS-based
Perot
Par02
Para3
li
Par05
carols
Para?
Paroa
Palos
Par10
Paii
Pei
Par13
Partd
Par1S
Par16
Parl7
Parts
Paris
Fill
Par21
Par22
Name was Type Chronic Modifier Acute PQL Units
Arsenic
Aquatic Life
C
36
SW
69
ug/L
Arsenic
Human Health
C
10
HH
ug/L
Cadmium
Aquatic Life
NC
8.9
SW
40.2
ug/L
Total Phenolic Compounds
Aquatic Life
NC
300
A
10
ug/L
Chromium VI
Aquatic Life
NC
50.4
SW
1107.8
ug/L
Chromium, Total
Aquatic Life
NC
N/A
SW
NIA
ug/L
Copper
Aquatic Life
NC
3.7
SW
5.8
ug/L
Cyanide
Aqua&Life
NC
1
SW
1
10
ug/L
Lead
Aquatic Life
NC
8.5
SW
220.8
ug/L
Mercury
Aquatic Lae
NC
25
SW
0.5
naP-
Molybdenum
Human Health
NC
2.0
HH
mg/L
Nickel
Aquatic Life
NC
8.3
SW
74.7
ug/L
Selenium
Aquatic Life
NC
71
SW
ug/L
Silver
Aquatic Life
NC
0.1
SW
2.2
ug/L
Zinc
Aquatic Life
NC
85.6
SW
95.1
ug/L
NOTE: The aquatic life chronic and acute WQS for several metals are calculated based on EPA conversi
see "piss. SW stds. As TM" for more details and summary of calculated WQS..
NC0083909_ 9595 SALTWATER RPA w_diss factors 20167a,input
7/6/2017

REASONABLE POTENTIAL ANALYSIS - DATA
Arsenic V."c'Umn-COPY•.I Cadmium vw"® men-cov .1
Chromium, Total
Maximum dam point¢ ..:im"m Clam amain
581 .58
Data
Data
BDL-112DL
Results
Data
Data
BDL=I2DL
Results
Date
Data
BDL=1121)1-
1
10/2/2012
10
5
Sal Dev.
0.4584
1
10/2/2012
5
2.5
Set Dev.
1.5038
1
1002012
20
10
2
11/6/2012
10
5
Mean
4.8909
2
W12013
10
5
Mean
3.4444
2
117/2013
10
5
3
12/4/2012
10
5
C.V.
0.0937
3
4=13
10
5
C.V.
OA366
3
402013
10
5
4
1012013
10
5
n
55
4
7/92013
<
5
2.5
n
18
4
7/9/2013
<
10
5
5
2/5/2013
<
10
5
5
10/812013
5
2.5
5
10/8/2013
<
10
5
6
31
10
5
61u9 Factor =
1.0000
6
1/14/2014
10
5
Mu6 Facto =
1.3000
6
1/142014
<
10
5
7
4IV2013
10
5
Max. Value
5.0 ug/L
7
4/812014
5
2.5
Max. Value
5.00 ug/L
7
41&2014
<
10
5
8
5f72013
<
10
5
Max. Prod CW
5.0 ug1L
8
702014
<
10
5
Max. Pred Cw 0
DETECTS ug1L
8
7IV2014
<
10
5
9
6/42013
10
5
9
10/72014
10
5
9
1017ii
<
10
5
10
7/0013
<
10
5
10
4/7/2015
<
10
5
10
4172015
10
5
11
8/7/2013
10
5
11
7/142015
10
5
11
7/14/2015
10
5
12
9/112013
<
10
5
12
10/6/2015
2
1
12
10/612015
<
10
5
13
10/8/2013
<
10
5
13
1/122016
<
5
2.5
13
1/122016
<
10
5
14
11/5/2013
3
3
14
41412016
<
5
2.5
14
4142016
<
10
5
15
12MM13
<
10
5
15
7/5/2016
5
2.5
15
715=16
<
10
5
16
1/142014
<
10
5
16
10/4/2016
<
2
1
16
10/42016
<
10
5
17
2=14
<
10
5
17
1/102017
<
5
2.5
17
1/10/2017
<
10
5
18
3142014
3
3
18
442017
<
10
5
18
V42017
<
10
5
19
41812014
10
5
19
19
20
5/62014
<
10
5
20
20
21
6/3/2014
3
3
21
21
22
7/2/2014
10
5
22
22
23
8/12/2014
<
10
5
23
23
24
9/9/2014
10
5
24
24
25
10f7/2014
<
10
5
25
25
26
11/42014
<
10
5
26
26
27
12/32014
<
10
5
27
27
28
1/8/2015
<
10
5
28
28
29
2/1012016
<
10
5
29
29
30
3/102015
<
10
5
30
30
31
40/2015
<
10
5
31
31
32
6/62015
<
10
5
32
32
33
ill "15
10
5
33
33
34
7/142015
<
10
5
34
34
35
8/11/2015
<
10
5
35
35
36
9/8/2015
10
5
36
36
37
10/1112015
<
10
5
37
37
38
11/102015
<
10
5
38
38
39
12/82015
<
10
5
39
39
40
111?/2016
<
10
5
40
40
41
2/2/2016
10
5
41
41
42
3112018
<
10
5
42
42
43
442016
<
10
5
43
43
44
5/10/2016
<
10
5
44
44
45
6/14/2016
<
10
5
45
45
46
7/&2016
<
10
5
46
46
47
8/11/2016
<
10
5
47
47
48
9/62016
<
1D
5
48
48
49
10/42016
<
10
5
49
49
50
11/82016
<
10
5
50
50
51
1282016
<
10
5
51
51
52
1/102017
<
10
5
52
52
53
217/2017
10
5
53
53
54
30/2017
10
5
54
54
55
4/4/2017
<
10
5
55
55
56
56
56
57
57
57
58
58
58
Mailmum r m
•58
Results
Sul Dev.
1.1785
Mean
5.2778
C.V.
0.2233
n
18
Mull Factor = 1.1500
Max. Value 10.0 ug1L
Max. Free Cw O DETECTS ug/L
Date
10/2/2012
1/7/2013
42/2013
WSM13
10/82013
11142014
4AM14
722014
10/7/2014
4/72015
7114/2015
10115=15
ifl22016
4/4/2016
7/520%
10/42016
1/10/2017
442017
NCO083909_ 9595 SALTWATER RPA W dins factors 20167a,data
Dale)

Copper
vm,w.•n„n-core.
Menimum Oau polnla
=ss
Data
BDL-112DL
Results
<
20
10
Ste Dev.
1.1785
10
5
Mean
5.2778
<
10
5
C.V.
0.2233
<
10
5
n
18
10
5
<
10
5
Wit Factor=
1.1500
10
5
Max. Value
10.00 ug/L
<
10
5
Max. Pred CW O DETECTS ug1L
<
10
5
10
5
10
5
<
10
5
10
5
10
5
10
5
10
5
0
5
10
5
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
REASONABLE POTENTIAL ANALYSIS - DATA
Date
Data
BDL=112DL
10CM12
<
5
5
1/7/2013
5
5
4=2013
<
5
5
781/2013
<
5
5
10/8/2013
<
5
5
1114Y2D14
<
5
5
4/8/2014
<
5
5
7/2/2014
<
5
5
1017/2D14
<
5
5
4/712015
<
5
5
7114=15
<
5
5
10/8/ID15
<
5
5
1/12/2016
<
5
5
4/4=6
<
5
5
7/5/2016
5
5
8/11/2016
<
5
5
10/4/2016
<
5
5
V10/2017
<
5
5
414/2D17
<
5
5
men •corr
m ease rwiiv
5B
Results
Ste Dev.
0.0000
Mean
5.0000
C.V.
0.0000
n
19
Wit Fadw 1.0000
Max. Value 5.0 ug1L
Max. Pred Ow O DETECTS ug/L
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
Data
Data
BDL=112DL
1002012
<
15
7.5
1/7/2013
<
10
5
4/2/2013
10
5
71VA13
10
5
10/8/2013
<
10
5
1/14/2014
<
10
5
4/8/2014
<
10
5
7/2/2014
10
5
10/7/2014
<
10
5
4/7/2015
<
10
5
7/1412015
<
10
5
10/612D15
<
10
5
1/12/2016
<
10
5
4/4/2016
<
10
5
7/512016
<
10
5
1014/2D16
<
10
5
1/10/2017
<
10
5
4/4/2017
<
10
5
Results Imo„ _.
Sitl Dew. 0.5893
Mean 5.1389
C.V. 0.1147
n 18
Mult Factor= 1.07
Max. Value 7.50 ug/L
Max. Pred Ow O DETECTS ug/L
Data Data
10/2/2012 < 0.5
1/7/2013 < 0.6
4/2/2013 0.5
7/9/2t113 0.5
10/8/2013 < 0.5
1/14/2014 < ox
4/8/2014 < 2
7/2/2014 < 2
10/7/2014 < 1
4f7/2D15 < 0.5
7/14/2015 < 2
10/6/2015 < 0.5
1/12/2016 < 2
4/4/2016 < 2
7/SW% < 2
10/4/2016 < 4
1/10/2017 < 10
414=17 < 0.5
NCO083909 9595 SALTWATER RPA w_diss factors 20167a,4ata
Date{

Mercury
vrur•sbe Corr.
YWmbn Nb pdnb
-se
BDL=112DL
Results
0.25
Sid De,
1.1384
0.25
Mean
0.8750
0.25
C.V.
1.3010
0.25
n
8
0.25
0.25
Mult Factor=
1.8600
1
Max. Value
5.0 ng1L
1
Max. Pred CW
O, DETECTS ng1L
0.5
0.25
1
0.25
1
1
1
2
5
0.25
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
REASONABLE POTENTIAL ANALYSIS - DATA
Nickel
Vabn•tnm•corr
Maximum Nte pdM�
=sa
Date
Data
BDL=1/2DL
Results
10/2/2012
<
5
2.5
Ste Dev.
21.9008
1/712D13
39
39
Moen
30.4
4/2/2013
27
27
C.V.
0.7194
7/92013
43
43
n
18
10/812013
64
64
1/142014
52
52
Mult FoMw
1.49W
4/82014
72
72
Max. Value
72.00 ug1L
7/22014
56
56
Max. Pred Cw
107.28 u9/1
10/7/2014
<
10
5
4/7/2016
<
10
5
7/14,2015
36
36
10/6/2015
36
36
1/12/2016
39
39
4/42016
31
31
7152016
<
5
2.5
10M2016
12
12
1/102017
13
13
4142017
13
13
Selenium
Vw. a"' V'OP .
MnxMum tleW poinb
=se
Silver
Date
Data
BDL-1120L
Results
Date
Data
BDL=112DL
1
101212D12
<
20
10
Sid Dev.
1.9878
1
10/2/2012
<
20
10
2
11/6/2012
10
5
Mean
5.5818
2
1/7/2013
10
5
3
12/4/2012
10
5
C.V.
0.3561
3
4l2/2013
10
5
4
1/7/2013
<
10
5
n
55
4
7/912013
10
5
5
2152013
<
10
5
5
10/82013
10
5
6
3142013
10
5
Mull Factor =
1.0100
6
1/14/2014
10
5
7
4/2/2013
10
5
Max Value
16.0 ug/L
7
4IV414
10
5
8
51712013
<
10
5
Max. Pred Cw
16.2 u91L
8
7/2/2014
<
10
5
9
6/4/2013
<
10
5
9
10/7/2014
<
10
5
10
7/9/2013
10
5
10
4172015
<
10
5
11
8/72013
<
10
5
it
7/14/2015
10
5
12
9/112013
10
5
12
1002U15
<
10
5
13
10/82013
<
10
5
13
1/12/2016
<
10
5
14
11/5/2013
11
11
14
4/42016
10
5
15
MUMS
10
5
15
7152016
<
10
5
16
1/142014
<
10
5
16
10/4/2016
<
10
5
17
2/9/2014
<
10
5
17
V102017
<
10
5
18
3142014
is
16
18
4142017
<
10
5
19
4/812014
<
10
5
19
20
51(12014
<
10
5
20
21
6FV2014
10
10
21
22
7=14
<
10
5
22
23
8/12/2014
<
10
5
23
24
9IM014
10
5
24
25
1022014
<
10
5
25
26
11/42014
<
10
5
26
27
1ZWM14
<
10
5
27
28
1/6/2015
10
5
28
29
2MU/P015
<
10
5
29
30
3/102015
<
10
5
30
31
Q712015
10
5
31
32
516/2015
<
10
5
32
33
6/3/2015
10
5
33
34
7/142015
<
10
5
34
35
8/112015
<
10
5
35
36
9/82015
<
10
5
36
37
10/6MS
<
10
5
37
38
11/102015
<
10
5
3B
39
12/8/2015
<
10
5
39
40
1/12/2016
c
10
5
40
41
2/2/2016
10
5
41
42
311M16
<
10
5
42
43
4142018
10
5
43
44
5/10/2016
<
10
5
44
45
6/14/2016
<
10
5
45
46
71VA16
<
10
5
46
47
8111=16
<
10
5
47
48
9/6/2016
10
5
48
49
10/42016
<
10
5
49
50
11/8/2016
<
10
5
50
51
12/BM16
<
10
5
51
52
1/10/2017
10
10
52
53
2172017
10
5
53
54
372017
<
10
5
54
55
4/42017
<
10
5
55
56
56
57
57
58
58
NC0083909_ 9595 SALTWATER RPA w_diss factors 20167a.dala
Date)

Results
Std De, 1.1785
Mean 5.2778
C.V. 0.2233
n 18
Mull Factor = 1.1500
Max. Value 10.00 ug(L
Max. Fred Cw 10 DETECTS ugrl
REASONABLE POTENTIAL ANALYSIS - DATA
Date
Data
BDL=1120L
Results I
1012/2012
<
20
10
Sld Dev.
22.1180
1O/2013
10
5
Mean
10.5000
4/2/2013
<
10
5
C.V.
2.1065
71WM13
<
10
5
n
18
10/812013
99
99
1/14/2014
<
10
5
Mult Factor =
2.2500
418=14
10
5
Max. Value
99.0 ug/L
702014
10
5
Mo. Pred Ow
222.8 u91
10t7/2014
<
10
5
4t7/2015
<
10
5
7/14/2015
<
10
5
10/6/2015
<
10
5
1/IZ2016
<
10
5
4/4/2016
<
10
5
7/5/2016
10
5
1014/2016
<
10
5
1/10/2017
<
10
5
4/4/2017
<
10
5
NC0083909_ 9595 SALTWATER RPA w_diss factors 20167a,dab
Data)

Rodanthe/Waves/Salvo RO WTP
NCO083909 Saltwater RPA 95% Probablity/95% Confidence
MAXIMUM DATA POINTS = 58
Qw(MGD)= 0.19
IQ IDS (cfs)= Tidal, IWC = 100%
7QIOS (cfs) = Tidal, IWC = 100%
7QIOW(cfs)= Tidal, IWC =100%
30Q2 (cfs) = Tidal, IWC = 100%
Avg. Stream Flow, QA (cfs) = Tidal, IWC = 100%
Receiving Stream: Blackmer Gut
WWTPTWTP Class: PC-1
IWC% @ IQIOS = 100
IWC%@7QIOS= 100
IWC%@7QIOW= 100
IWC%@30Q2= 100
IWC%@QA= 100
Stream Gass: SA, HQW
Outfall 001
Qw = 0.188129 MGD
YOU HAVE DESIGNATED THIS RECEIVING
STREAM AS HOW OR ORW.
PARAMETER
INC STANDARDS OR EPA CRITERIA
N
REASONABLE POTENTIAL RESULTS
TYPE
a
z
RECOMMENDED ACTION
Applied
<'hronic Acute
n
It #Det. Max Pred Cw Allowable Cw
Standard
Acute (SW): 34.5
Arsenic
C
18 SW(7QIOs) 34.5
ug/L.
55 3
5.0
_ _
Chronic(SW):___18.0__
No value > Allowable Cw
Arsenic
C
5 HH(Qavg)
ug/L
Chronic(HH): S11
RPA for non -AL -apply Monthly Monitoring
No value > Allowable Cw
with Limit
Acute: 20.10
No detects
Cadmium
NC
4.45 SW(7QIOs) 20.1
ug/L
18 a
\'O UF.TECiS
_ _ _ _
Chronic: ____4.45------------------------------
Max MDL= 10
Acute: 553.9
Chromium VI
NC
25.2 SW(7QIOs) 553.9
N/A
_
a. No Monitoring required Well Total
Chromium, Total
NC
u,_'I.
I s
O DETECTS
Chromium samples are < the Chromium VI
Allowable CW
Max MDL-20
Acute: 2.90
No detects
Copper
NC
1.35 SW(7QIOs) 2.9
ug/L(J
18 0
�DETECTS
_ _ _ _
Chronic:_____ 1.85 __
______________
Max MDL=20
Acute: 0.5
No detects
Cyanide
NC
0.5 SW(7QIOs) 0.5
10.0
ug/L
19 11
%D U£TEC75
Acute: 110.40
No detects
Lead
NC
4.25 SW(7QIOs) 110.4
ug/L
13 n
\O DETECTS
_ _ _ __
__________________________
Chronic:4.25
Max MDL= 15
Acute: NO WQS
No detects
Mercury
NC
12.5 SW(7QIOs)
0.5
ng/L
IS o
,%'O DETECTS
_
'---'---'-'--
Max MDL= 10
Acute: 37.35
RPA for non -AL - apply Monthly Monitoring
Nickel
NC
4.15 SW(7QIOs) 37.35
ugJL
18 14
107.3
with Limit
_ _ _
_______________________._
16 values > Allowable C'w
Acute: NO WQS
No RPA, Predicted Max > 50% ofAllowable
Selenium
INC
35.5 SW(7QIOs)
ug/L
55 4
16.16
Cw- apply Quarterly Monitoring
NC0083909_ 9595 SALTWATER RPA w_diss factors 20167e,rpa
Page 1 of 2 7/612017

Rodanthe/Waves/Salvo RO WTP
NCO083909 Saltwater RPA 95% Probablitv/95% Confidence
Outfal 1001
Qw = 0.188129 MGD
Chronic: 35.5
No value > Allowable Cc
Acute: 1.10
No detect.%
Silver
NC
0.05 SW(7QIOs) 1.1
ug/L
IS 0
NO DETECtS
__
__ _ _______ _ _ ___ ______
_ _ _ _ _ _
Chronic: 0.05
Max MDL=20
Acute: 47.6
RPA - Apply Monthly Monitoring with Limit
Zinc
NC
42.8 SW(7QIOs) 47.55
ng/L
18 I
222.75
— _______________________ —
_
Chronic: 42.8—
I value(si > AllON'nble t w
Page 2 of 2
NCO083909_ 9595 SALTWATER RPA w_diss factors 20167a,rpa
7/6/2G 17

AU Number: AU Name:
AU Description:
Pasquotank River Basin
Area: AU Units: Classification:
NC River Basin Pasquotank River Basin
Subbasin Albemarle Sound
30b ALBEMARLE SOUND 61,749.7 SAcres SIB
Sound from 0.5 miles east of Kendricks Creek to the Harvey Point/ Bull Bay Crossing
IRCategory: ACS: Parameter Of Interest: Collection Year: 303(d) yr:
5 EC Copper (3 µg/I, AL, SW) 2008 2008
30c ALBEMARLE SOUND 222,168.5 S Acres SB
Sound from the Harvey Point/ Bull Bay Crossing to Roanoke and Croatan Sounds
RCategory:
ACS:
Parameter Of Interest:
Collection Year:
303(d) yr:
5
EC
Copper (3 µg/I, AL, SW)
2008
2008
26 ALBEMARLE SOUND 6.5 FW Miles B;NSW
Freshwater portion of Albemarle Sound formerly part of Chowan River Basin 15600.4 acres
IRCategory: ACS: Parameter Of Interest: Collection Year: 303(d) yr:
5 EC Dioxin Fish Tissue Advisory (Advisory, FC, NC) 2012 2010
30-16-(7) Alligator River 38,420.6 5 Acres SC;Sw,ORW
From mouth of Northwest Fork to U. S. Hwy. 64
RCategory:
ACS:
Parameter Of Interest:
Collection Year:
303(d) yr:
5
EC
Copper (3 µg/I, AL, SW)
2008
2008
30-20-5 Baum Creek 10.9 S Acres SA;HQW
From source to Croatan Sound
IRCategory: ACS: Parameter Of Interest: Collection Year: 303(d) yr:
5 EC Shellfish Growing Area -Prohibited (Fecal, SH, SA) 2010 2002
30-22-13 Blackmar Gut 4.6 S Acres SA;HQW
From source to Pamlico Sound
RCategory:
ACS:
Parameter Of Interest:
Collection Year:
303(d) yr:
5
EC
Shellfish Growing Area -Prohibited
(Fecal, SH, SA)
2010
2008
30-21-7a Broad Creek 126.0 S Acres SA;HQW
DEH closed area at head of creek
IRCategory: ACS: Parameter Of Interest: Collection Year: 303(d) yr:
5 EC Shellfish Growing Area -Prohibited (Fecal, SH, SA) 2010 2008
30-20-4 Callaghan Creek 24.8 S Acres SA;HQW
From source to Croatan Sound
RCategory:
ACS:
Parameter Of Interest:
Collection Year:
303(d) yr:
5
EC
Shellfish Growing Area -Prohibited (Fecal, SH, SA)
2010
2002
2014 NC 303(d) List -Category 5 Final December 19, 2014 Page 72 of 149

Young, Brianna A
From: Pat Irvin <[e-mail]>
Sent: Wednesday, May 10, 2017 8:17 AM
To: Young, Brianna A
Cc: Ken Flatt; Jerry Lofland; [e-mail]
Subject: Rodanthe/Waves/Salvo Reverse Osmosis WTP (NC0083909)
Brianna:
There have been no changes to the treatment process since the renewal submittal.
Pat
Mr. Pat Irwin
Assistant Utilities Director
Department of Water
600 Mustian Street
Kill Devil Hills, NC 27948
[phone] (phone)
(252 441-2239 (fax)
Email correspondence to and from this address is subject to the North Carolina Public Records Law and may be disclosed
to third parties.

Young, Brianna A
From: Young, Brianna A
Sent: Tuesday, May 09, 2017 3:49 PM
To: '[e-mail]'
Cc: [e-mail]'; '[e-mail]'
Subject: Rodanthe/Waves/Salvo Reverse Osmosis WTP (NC0083909)
Good afternoon Mr. Flatt,
I am currently working on the renewal of the permit application for Rodanthe/Waves/Salvo Reverse Osmosis WTP
(NPDES permit NC0083909). Based on our records, your application was received on August 1, 2012. Since this permit
renewal application has been submitted, have there been any changes or updates to the water treatment plant? The
permit should correctly reflect any components or treatments currently in place. Please let me know if you have any
questions concerning this request.
Thank you,
Brianna Young
Environmental Specialist
Division of Water Resources
N.C. Department of Environmental Quality
Office: 919-807-6333
Brianna.Youno anncdenr.gov
Mailing address:
1617 Mail Service Center
Raleigh, NC 27699-1617

5400 Glenwood Avenue, Suite 300
Raleigh, North Carolina 27612
tel: [phone]
fax: [phone]
ccimsmith.com
July 3, 2012
Mrs. Dina Sprinkle
NC DENR Division of Water Quality
Point Source Branch
1617 Mail Service Center
Raleigh, North Carolina 27699-1617
Subject: Dare County
Application for Renewal of NPDES Permit - Mac Midgett Rodanthe/Waves/Salvo RO WTP
Permit No. NCO083909
Dear Mrs. Sprinkle:
Dare County requests to renew its NPDES permit for the Mac Midgett Rodanthe/Waves/Salvo
Reverse Osmosis Water Treatment Plant (WTP) (NC0083909). The enclosed renewal package
includes the following:
• Application Form (Short Form C-WTP)
• Solids Handling Plan
• Flow Schematic
• USGS map depicting the outfall
If you have any questions about the application or need additional information, please contact me at
boonekrPcdmsmith.com or [phone]. Thank you for your assistance.
Sincerely,
"- u n
Kelly R. Boone, P.E.
CDM Smith Inc.
cc: Ken Flatt, Dare County Water Department
Kevin Irby, CDM Smith
Michael Sloop, CDM Smith
C
WATER + ENVIRONMENT + TRANSPORTATION + ENERGY + FACILITIES

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 INCO083909
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
Facility Name
Mailing Address
City
State / Zip Code
Telephone Number
Fax Number
e-mail Address
Dare County (Ken Flatt)
Mac Midgett Rodanthe /Waves/ Salvo Reverse Osmosis Water
Treatment Plant (WTP)
600 Mustian Street
Kill Devil Hills
NC / 27948
[phone]
[phone]
[e-mail]
2. Location of facility producing discharge:
Check here if same as above ❑
Street Address or State Road
City
State / Zip Code
County
23697 Highway 12
Rodanthe
NC / 27689
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 / 27948
Telephone Number [phone]
Fax Number [phone]
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
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)
Groundwater
7. Describe the treatment process(es) for the raw water:
Groundwater is pumped from 2 wells (with one additional well in the process of being
added) to the water treatment plant. Scale inhibitor is added prior to treatment. The
water is treated using a reverse osmosis (RO) process. Approximately 75 percent of the
water is recovered; 25 percent is discharged as RO reject water.
S. Describe the wastewater and the treatment process(es) for wastewater generated by the
facility:
Wastewater from the facility consists of the RO process reject water. The effluent is .
discharged without treatment through an outfall into Blackmar Gut, which flows into
Pamlico Sound.
90 Number of separate discharge points: 1
Outfall Identification number(s) 001
10. Frequency of discharge: Continuous
If intermittent:
Days per week discharge occurs: Duration:
11. Plant design potable flowrate 1.25 MGD
Backwash or reject flow 0.3 MGD
Intermittent ❑
12. Name of receiving stream(s) (Provide a map showing the exact location of each outfall, including
latitude and longitude):
Blackmar Gut
Page 2*of 4 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 No X
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 is. the only additive that has the potential to be discharged. Other additives
that are used at the water treatment plant are added after the treatment process and are
not present in the effluent that is discharged.
14. Is this facility located on Indian country? (check one)
Yes ❑
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
16. NEW Applicants
Information needed in addition to items I-I5:
> New applicants must.contact a permit coordinator with the NCDENR Customer
Service Center.
Was the Customer Service Center contacted? ❑ Yes ❑ No
> Analyses of source water collected
y 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.
Robert Outten&W.-n ck�5 sA�l Dare -County Manage
,ELinted name of Person Signing Title
�4 *CQVua� . (C����
Signature of Applicant Date
Page 3 of 4 Version 5/2012

Dare County Mac Midgett Rodanthe/Waves/Salvo RO WTP
NPDES NC0083909
Solids Handling Plan
The discharge from this water treatment plant consists of reject water from the reverse
osmosis treatment process. The reject water is discharged without treatment, and no
solids are generated or removed.
Signed,
Robert Outten, Manager
Dare County ho..

I V p a
U W
w �
w z
0 ❑ 00 � u x
BULK STORAGE—qr7p O
CD
V) C)
W
LT'AIN'oz
0
0
0
W
Q .�. cJ
3 �o
OutPau 001 H Cn ri
Maxim
un 12,500 GPD
(Sound Discharge> (7 Q
U F
LEGEND �]
—001 Discharge
Q