NC0086932_Issuance of Permit_20031124

Michael F.Easley,Governor
State of North Carolina
G William G.Ross,Jr.,Secretary
�� Department of Environment and Natural Resources
l 7 C Alan W.Klimek,P.E.,Director
Division of Water Quality
November 24, 2003
Mr. Robert W. Oreskovich, Director
Dare County Water Department
600 Mustian Street
Kill Devil Hills, North Carolina 27948
Subject: NPDES Permit Issuance
Stumpy Point Reverse Osmosis Discharge
Permit No. NC0086932
Dare County
Dear Mr. Oreskovich:
In accordance with the application for discharge permit, the Division is forwarding
herewith the subject NPDES permit for reverse osmosis reject wastewater, NC0086932. 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.
The Division of Water Quality appreciates Dare County's efforts to submerge the diffuser
and comply with Special Condition A. (3.). No major changes have been made to this final permit
from the draft permit dated August 20, 2003.
The requirement to monitor chlorine has been removed from the permit, since chlorine is
not used in the raw or concentrate stream (as stated in your letter dated August 26, 2003). A
special condition, Part A.(5.), has been placed in the permit should these conditions change at
some future time.
Because no wastewater treatment is used for the RO reject water, the Division again has
concerns that the limits can be consistently met (although, to date, limits have been met). Should
excursions in effluent limits occur, the Division will require that any and all steps be taken to
assure future compliance.
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, Mail Service Center 6714, Raleigh, North Carolina
27699-6714. Unless such a demand is made, this permit shall be final and binding.
Please take notice that this permit is not transferable except after notice to the Division of
Water Quality. The Division of Water Quality may require modification or revocation and
reissuance of the permit.
This permit does not affect the legal requirements to obtain other permits which may be required
by the Division of Water Quality, the Division of Land Resources, the Coastal Area Management Act, or
any other federal or local governmental permit.
North Carolina Division of Water Quality [phone]
1617 Mail Service Center FAX[phone]
Raleigh,North Carolina 27699-1617 On the Internet at http://h2o.enr.state.nc.us/

Mr. Oreskovich •
Page•2
If you have any questions regarding this NPDES permit, please contact Susan Wilson at
(919) 733 - 5083, extension 510.
Sincerely,
Alan W. Klimek, P.E.
cc: Central Files
Washington Regional Office/Water Quality Section/ Alton Hodge
Washington Regional Office/ DEH/ Public Water Supply
NPDES Unit
Aquatic Toxicology Unit
Lynn Henry, Division of Marine Fisheries
Sara Ward, US Fish &Wildlife Service

• Permit No. NC0086932
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provisions of North Carolina General Statute 143-215.1, other lawful
standards and regulations promulgated and adopted by the North Carolina Water Quality
Commission, and the Federal Water Pollution Control Act, as amended,
Dare County
Stumpy Point Reverse Osmosis Water Treatment Plant Discharge
is hereby authorized to discharge wastewater from a facility located at
Stumpy Point RO Plant
Southest of Highway 264 and NCSR 1100
Dare County
to receiving waters designated as Stumpy Point Bay in the Pasquotank River Basin
in accordance with the discharge limitations, monitoring requirements, and other conditions set
forth in Parts I, II, III, and IV hereof.
This permit shall become effective January 1, 2004.
This permit and the authorization to discharge shall expire at midnight on December 31, 2007.
Signed this day November 24, 2003.
Alan W. Klimek, P.E., Director
Division of Water Quality
By the Authority of the Environmental Management Commission
Stumpy Point Reverse Osmosis Discharge
NPDES Permit No. NC0086932

•
Permit No. NC0086932
SUPPLEMENT TO PERMIT COVER SHEET
Dare County Reverse Osmosis Water Treatment Plant
RO Reject Discharge Wastewater
is hereby authorized to:
1. Continue to discharge up to 0.043 MGD reject water from operation of a reverse
osmosis water treatment plant located off Highway 264 and NCSR 1100, Dare County,
and
2. Discharge reject wastewater at the location specified on the attached map into Stumpy
Point Bay which is classified SA waters in the Pasquotank River Basin.
Stumpy Point Reverse Osmosis Discharge
NPDES No. NC0086932

' A (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
During the period beginning on the effective date of the permit and lasting until expiration, the
Permittee is authorized to discharge from outfall(s) serial number 001- Reverse Osmosis Reject
Water. Such discharges shall be limited and monitored by the Permittee as specified below:
EFFLUENT DISCHARGE LIMITATIONS Monitoring Requirements
CHARACTERISTICS
Measurement Sample
Monthly Average Daily Maximum Frequency Sample Type Location
Flow(MGD) 0.0432 MGD Continuous Recording I or E
Total Dissolved Solids Monthly Grab E
Temperature Monthly Grab E&Instream
Dissolved Oxygen Monthly Grab E&Instream
Salinity Monthly' Grab E&Instream
pH2 Monthly Grab E&Instream
Conductivity Monthly Grab E&Instream
Total Aluminum Monthly Grab E
Total Arsenic 50 ug/1 Monthly Grab E
Total Beryllium 0.117 ug/1 Monthly Grab E
Total Cadmium 42 ug/1 Monthly Grab E
Total Chromium - Monthly Grab E
Total Cyanide 1 ug/L Monthly Grab E
Total Iron Monthly _ Grab E
Total Lead 221 ug/1 Monthly Grab E
Total Mercury 0.025 ug/1 Monthly Grab E
Total Nickel 75 ug/1 Monthly Grab E
Total Selenium 71 ug/1 Monthly Grab E
Total Silver Monthly Grab E
Total Zinc Monthly Grab E
Total Copper Monthly Grab E
Chloride Monthly Grab E
TOC Monthly Grab E
Total Fluoride Monthly Grab E
Total Nitrogen Monthly Grab E
Total Phosphorus Monthly Grab E
NH3-N Monthly Grab E
Acute Toxicity 3 Quarterly Grab E
NOTES:
1 Sample Locations: I - Influent; E - Effluent; Instream - see Part I, Special Condition A.(4). regarding
instream monitoring frequencies and months.
2 The pH shall not be less than 6.8 standard units or greater than 8.5 standard units.
3 Acute Toxicity Monitoring (Mysid) 24hr P/F @ 90%, Quarterly; January, April, See Special Condition
A(2). Quarterly monitoring of toxicants should coincide with quarterly toxicity monitoring.
Upon sampling for 12 months, the permittee may request a review of reasonable potential for monitoring and
effluent limitations.
THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE
AMOUNTS.
Stumpy Point Reverse Osmosis Discharge
NPDES No. NC0086932

A (2). ACUTE TOXICITY PASS/FAIL MONITORING (QRTRLY)
The permittee shall conduct acute toxicity tests on a quarterly basis using protocols defined in the
North Carolina Procedure Document entitled "Pass/Fail Methodology For Determining Acute
Toxicity In A Single Effluent Concentration" (Revised-July, 1992 or subsequent versions). The
monitoring shall be performed as a Mysidopsis bahia 24 hour static test. The effluent
concentration defined as treatment two in the procedure document will be 90%. Effluent samples
for self-monitoring purposes must be obtained during representative effluent discharge below all
waste treatment. The tests will be performed during the months of January, April,July, and
October.
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, DWQ Form AT-2 (original) is to be sent to the following address:
Attention: Environmental Sciences Branch
North Carolina Division of
Water Quality
1621 Mail Service Center
Raleigh, N.C. 27699-1621
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 Environmental Sciences Branch 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 until such time that a valid test is submitted. Upon
submission of a valid test, this monthly test requirement will revert to quarterly in the months
specified above.
Should any test data from this monitoring requirement or tests performed by the North Carolina
Division of Water Quality 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.
A (3). DISCHARGE SPECIAL CONDITION
The effluent diffuser must be designed to prevent surface turbulence and bottom scour. Should
the location of the discharge cause visible turbulence within Stumpy Point Bay, the Division may
require that the discharge be relocated.
The effluent diffuser shall be submerged during low tide conditions.
Stumpy Point Reverse Osmosis Discharge
NPDES No. NC0086932

• •• I• 1
A (4). INSTREAM MONITORING REQUIREMENTS
The following parameter shall be monitored within Stumpy Point Bay (at the locations indicated)
2/month year round.
Parameter Location Frequenc. Months
Salinity (ppt) B, MI, M2. 2/month January through
Temperature M3, M4. M5 December (year round)
Dissolved Oxygen
Conductivity
The sampling points, as indicated on the map below, are described as:
B- Background sample should be taken along the shoreline outside the influence of the discharge
(at a convenient shoreline location)
MI - along the shoreline, approximately 50 feet east of the discharge
M2 - along the shoreline, approximately 100 feet east of the discharge
M3 - along the shoreline, approximately 200 feet east of the discharge
M4 - along the shoreline, approximately 50 feet west of the discharge
M5 - along the shoreline, approximately 100 feet west of the discharge
Should instream monitoring indicate little to no effect of the discharge on the salinity of the receiving
water after 2 years of monitoring, the permittee may request that the monitoring requirements be re-
evaluated.
NOTE: Map is not to scale.
Ii, rl i
fill . f;952
1 ! I
I I
2 Stu �� "-oin 42'30"
I
�c • "et. 1100
M1 ML M3 fill 0spe�"• _ •
T;, DPt Tabernacle - �`�` / j
3 ~�
N
Stumpy Point Reverse Osmosis Discharge
NPDES No. NC0086932

•
•
A (5): Total Residual Chlorine Monitoring
It is the Division of Water Quality's understanding that no residual chlorine will be in the reject
water from the reverse osmosis process. Should this not be the case in the future, the Division of
Water Quality, NPDES Unit, shall be notified immediately and this permit may be reopened to
include total residual chlorine monitoring and a limit.
•
Stumpy Point Reverse Osmosis Discharge
NPDES No. NC0086932

A (4). INSTREAM MONITORING REQUIREMENTS
The following rameter shall be monitored within Stumpy Point Bay (at th orations indicated)
2/month year ro nd.
Parameter Location Frequency Month
Salinity(ppt) :, Ml, M2, 2/month J. • ary through
Temperature M3, 4, M5 •ecember (year round)
Dissolved Oxygen
Conductivity
The sampling points, as indicated on the . ap .- ow, are described as:
B-Background sample should be taken on: e shoreline outside the influence of the discharge
(at a convenient shoreline location)
M1 -along the shoreline, appro : ely 50 feet east •f the discharge
M2 - along the shoreline, appro ately 100 feet east o the discharge
M3 - along the shoreline, ap. .ximately 200 feet east of - discharge
M4 - along the shoreline, . .proximately 50 feet west of the •'-charge
M5 - along the shoreli =, approximately 100 feet west of the di- harge
Should instream - •nitoring indicate little to no effect of the discharge • the salinity of the receiving
water after 2 ars of monitoring, the permittee may request that the mo 'oring requirements be re-
evaluated.
NOT': Map is not to scale.
Stumpy Point Reverse Osmosis Discharge
NPDES No. NC0086932

•
C •
pJC O
DEC 1 2 2003
" ' PUBUC NOTICE '11.
STATE OF NORTH CAROUNA
ENVIRONMENTAL MANAGEMENT DENR-WATER QUALITY
COMMISSION/NPDES UNIT
+' 1617 MAIL SERVICE CENTER POINT SOURCE BRANCH
RALEIGH,NC 27699-1617 NORTH
NOTIFICATION OF INTENT TO ISSUE
A NPDES WASTEWATER PERMIT DARE COUNTY.
On the basis of thorough staff review and
• application of NC General Statute 143.21.
Public law 92-500 and other lawful sten AFFIDAVIT OF PUBLICATION
dards and regulations, the North Carolina
Environmental Management Commission Before the undersigned,a Notary Public of said County
proposes to issue a National Pollutant Dis- and State,duly commissioned,qualified,and authorized
charge Elimination System(NPDES)waste-
water discharge permit to the person(s) by law to administer oaths,personally appeared
listed below effective 45 days from the pub-
lish date of this nonce. Susan M. Simpson , t r e it S U i"a.T..
Written comments regarding the proposed
permit will be accepted until 30 days after
the publish date of this notice.All comments ,who being
received prior to that date are considered in
the final determinations regarding the profirst duly sworn,deposes and says: that he(she)'is of The
posed permit The Director of the NC Divi- Times Printing Co., Inc., engaged in the publication of a
sion of Water Quality may decide to hold a newspaper known as THE COASTLAND TIMES, pub-
public meeting for the proposed permit
thDi
should the Division receiveivea significant lisped,issued,and entered as second class mail in the Town
degree of public interest of Manteo,in said County and State;that he is authorized to
Copies of the draft permit and other sup- make this affidavit and sworn statement;that the notice or
porting rmation in file used to deterpermit are other legal advertisement,a true copy of which is attached
conditions present in the draft permit are
available upon request and payment of the hereto,was published in THE COASTLAND TIMES on the
costs of reproduction. Mail comments following dates:
and/or requests for information to the NC
Division, of Water Quality at the above August 19 , 2003
address or call Ms. Valens Stephens at
[phone], extension 520. Please
include the NPDES permit number
(attached)in any communication.Interested •
persons may also visit the Division of Water and that the said newspaper in which said notice, paper,
Quality at 512 N.Salisbury Street, Raleigh,
NC 27604-1148 between the hours of 8:00 document, or legal advertisement was published was, at
a.m.and 5:00 p.m.to review information on the time of each and every such publication,a newspaper
file. meeting all of the requirements and qualifications of Sec-
Dare County-Cape Hatteras Reverse
Osmosis Water Treatment Plant,600 Mus tions 1-596 and 1-597 of the General Statutes of North Caro-
tian Street, KH Devil Hills, North Carolina lina and was a qualified newspaper within the meaning of
27948, has applied for renewal of its Section 1-597 of the General Statutes of North Carolina.
NPDES permit(NC0085707)discharging to
the Pamlico Sound in the Pasquotank River 6thO c t o b e r
Basin.This discharge may affect future dis- This Pn of , 2003
charges in this portion of the basin. ,\
Dare County,',Stumpy Point Reverse
Osmosis Water Treatment Plant, P.O. Box .-41.4... .. . . ..(94 r. ...
1000, Manteo, North Carolina 27954, has
applied for renewal of its NPDES permit Sworn to a . subscribed to befor• m•,this 6t,•
(NC0086932) discharging to Stumpy Point
Bay in the Pasquotank River Basin. Some
metals are water quality limited within this day of .0 "r , 2003
permit.This discharge may affect future dis- -•�---� - A
charges in this portion of the basin. 01 i L�� t`i - W .A.1-A.l.S.,t
8-19c Notary Public
My Commission expires:A U.g.u.s t..1.2....a0.0 5

DENR/DWQ
r FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NC0086932, Stumpy Point RO Plant/ Dare Co.
Facility Information
Applicant/Facility Name: Dare County/.Stumpy Point RO Plant Discharge WW
Applicant Address: 600 Mustian Street; Kill Devil Hills, NC 27948
Facility Address: Intersection of Hwy. 264/NCSR 1100
Permitted Flow 0.0432 MGD (est. at ultimate build-out)
Type of Waste: Non domestic; non-process
Facility/Permit Status: Renewal
County: Dare
Miscellaneous
Receiving Stream: Stumpy Point Regional Office: WaRO
Bay
Stream Classification: SA; PNA Quad E35NE, Englehard NE
303(d) Listed?: No Permit Writer: S. Wilson
Subbasin: 030155/ Pasq. Date: July 30, 2003
Drainage Area (mi2): unknown
Summer 7Q10 (cfs) 0 (tidal)
Winter 7Q10 (cfs):
•
Average Flow (cfs):
IWC (%): 100
Primary SIC Code: 4941; Disch
code = 22
SUMMARY
Dare County/ Stumpy Point discharges reject water from its RO plant. The county tapped into
the deep Yorktown aquifer. The plant will ultimately discharge approximately 43,200 gpd to
Stumpy Point Bay.
This RO facility has no treatment of the reject water; most other existing ROs have no
treatment. The Division does have concerns about the ability to consistently achieve limits
imposed in the permit. Due to the limited discharge options and the need for potable water in
the county, discharge appears to be the only option at this time. Discharge was determined to
be the most economically feasible, environmentally sound alternative as long as limits are
attained.
The discharge is in a designated primary nursery area.
An Authorization to Construct was issued July 25, 2001 for pipe and diffuser system. The
facility has only been discharging since December 2002, so there is limited data to review for
this renewal.
Based on regional office comments, during some periods the diffuser was exposed. The
permittee will be notified of this and told to correct.
TOXICITY TESTING:
Based on this discharge's location in "SA" waters and current policy for RO plants, Quarterly
Acute Limit, P/F at 90%, mysid 24 hour testing is required. The facility has passed 2 tests
since discharge began.
INSTREAM MONITORING:
Instream monitoring for salinity was required at various points in the bay with the previous
permit. Due to the limited amount of data (and not a full season of data), the same instream
monitoring will be required with this renewal with the addition of D.O., pH, and temperature.
Dare Co./Stumpy Point RO WTP
NPDES Renewal
Page 1

i
PROPOSED REQUIREMENTS:
1,
Due to the limited amount of data, the same limit and monitoring frequencies will be required
with this discharge, with additional requirements based on the Division's new
Recommendations for Water Treatment Plant Permitting.
Metals:
Metals will remain as monthly monitoring. Aluminum, arsenic, beryllium, cadmium, copper,
cyanide, lead, mercury, nickel, selenium, and silver were all below detectable for the period of
reivew (December 2002 - June 2003). The permittee will be advised that they may request
review of this data after approximately 12 months of data has been collected (through at least
December 2003).
Chlorides, chromium, zinc, fluoride and iron were above detectable levels.
Other Parameters
Ammonia and total nitrogen monitoring will be added (monthly).
Although chlorine is not used in the process, total residual chlorine monitoring will
be recommended (with monitoring required if chlorine is used in the process).
TSS, settleable solids, and turbidity monitoring will be eliminated. Monthly total
dissolved solids monitoring will be required in its place.
Due to the unknown tidal/freshwater inflow conditions acute limits will be given for some
parameters of concern. (This is a continuation from the previous permit).
PROPOSED SCHEDULE FOR PERMIT ISSUANCE:
Draft Permit to Public Notice: August 20, 2003 (est.)
Permit Scheduled to Issue: October 6, 2003 (est.)
•
STATE CONTACT:
If you have any questions on any of the above information or on the attached permit, please
contact Susan Wilson at [phone] ext. 510.
Dare Co./Stumpy Point RO WTP
NPDES Renewal
Page 2