NC0083909_Permit Issuance_20001222

State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Bill Holman, Secretary
Kerr T. Stevens, Director
December 22, 2000
Mr. Patrick Irwin
Plant Superintendent
Dare County Water Department
P.O. Box 500
Rodanthe, North Carolina 27968
`�
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Subject: NPDES Permit Issuance
Permit Number NCO083909
Rodan the /Waves/Salvo RO
Dare County
Dear Mr. Irwin:
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).
The following changes have been made to the above referenced permit and were noted in the draft
permit previously sent to you:
• A flow limit approximately equivalent to the maximum possible reject rate for the existing
treatment equipment has been installed.
• All monitoring has been changed to monthly.
• Monitoring for conductivity, arsenic, cadmium, chloride, chromium, copper, cyanide, lead,
mercury, nickel, salinity, selenium, silver, zinc, fluoride, iron, total residual chlorine (TRC), and
total phosphorus has been installed in accordance with current permitting policy for RO
discharges.
• Effluent limits have been installed for various parameters. You may request that the Division
review the need for the above monitoring and limitations after 12 months of data collection.
• Total suspended solids limitations have been modified to reflect requirements for discharges to
waters classified SA.
In response to letters dated 5/24/99 and 4/25/00 from Eric Weatherly of Hobbs, Upchurch `8?
Associates, the Division submits the following:
1617 MAIL SERVICE CENTER, RALEIGH, NORTH CAROLINA 27699-1617 - TELEPHONE [phone]/FAX [phone]
AN EQUAL OPPORTUNITY AFFIRMATIVE ACTION EMPLOYER - 50% RECYCLED/ 10% POST -CONSUMER PAPER
VISIT US ON THE WEB AT http://h2o.enr.state.nc.us/NPDES

• With regard to compliance, the following determination has been made for parameters with
permit limits: any sample values below the corresponding quantitation level should be considered
compliant with the permit limit, even if the permit limit is below the quantitation level. A
footnote has been added to the effluent sheet. The quantitation level for mercury and cyanide are
0.2 µg/L and 10.0 µg/L, respectively.
• Regarding some permit limits being below drinking water standards: effluent limits are based on
water quality standards, and not drinking water standards, to protect aquatic life against acute
and chronic exposure. Ambient levels must be below water quality standards to ensure against
toxicity and inhibition of any sensitive organisms. These ambient levels are typically below that
level considered safe for human consumption.
• The flow limit has been changed to 0.3 MGD to reflect the capacity of the installed equipment.
Based upon Division policy, this level of discharge requires the installation of toxicity monitoring
in the permit. Please review condition A.(2). To familiarize yourself with the monitoring
requirements.
• Upon installation of additional RO trains, the plant may request a permit expansion. Any
expansion above 0.5 MGD will require all monitoring be increased to 2/Month and the toxicity
monitoring condition will be changed to a toxicity limit.
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 (50) 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 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 re -issuance 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 or permits
required by the Division of Land Resources, the Coastal Area Management Act or any other Federal or Local
governmental permit that may be required.
If you have any questions concerning this permit, please contact David Goodrich at telephone number
[phone], extension 517.
Sincerely,
Original Signed By
David A. Goodrich
Kerr T. Stevens
cc: Central Files
Washington Regional Office/Water Quality Section
NPDES Unit
Point Source Compliance Enforcement Unit
Aquatic Toxicology Unit

n
Permit No. NCO085909
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 provision of North Carolina General Statute 145-215.1. 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
Rodanthe/Waves/Salve Water Treatment Plant
Off of NCSR 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, 2001.
This permit and authorization to discharge shall expire at midnight on March 51, 2005.
Signed this day December 22. 2000.
Original Signed
®mid A. Goodrich
Kerr T. Stevens, Director
Division of Water Quality
By Authority of the Environmental Management Commission

Permit No. NCO083909
SUPPLEMENT TO PERMIT COVER SHEET
Dare County
is hereby authorized to:
Operate a conveyance system for reject water from a reverse osmosis plant located at
Rodanthe/Waves/Salvo Water Treatment Plant, off of NCSR 12, Rodanthe, Dare County:
and
2. Discharge reverse osmosis reject water at the location specified on the attached map into
Blackmar Gut, a class SA water in the Pasquotank River Basin.

F F. R F. F: L C: '.E I
Pauls'Hitch - _ . �.�„►.�
Light •`ni
Uncle Jin mvs _ ' : ~ • ll
Landing l ;• `'
1: d'
.. •r^o
I Biac mar Gut a -� ti. - •'
0,�
aCge p Radantae:1:= -Ova
ROAD CLASSIFICATION
PRIMARY HIGHWAY LIGHT•DUTY ROAD. HARD OR
HARD SURFACE IMPROVED SURFACE
SECONDARY HIGHWAY
HARD SURFACE C==NNN= UNIMPROVED ROAD
Latitude 35°35'43"
Longitude 751128'12"
Map # E36SE
Sub -basin 30155
Stream Class
SA
Discharge Codes
22
Receiving Stream
Blackmar Gut
Design Q �..
Permit expires03/ 31 / 03
SCALE 1:24 000
CONTOUR INTERVAL 5 FEET
QUAD LOCATION
Dare County Regional Water System
NCO083909
Dare County

A (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL
Permit No. NCO083909
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 CHARACTERISTICS
DISCHARGE
LIMITATIONS
MONITORING REQUIREMENTS
Monthly Average
Daily Maximum
Measurement Frequency
Sample Type
Sample Locations
Flow MGD
0.3
Continuous
Recording
Effluent
Total Suspended Solids
20.0 mg/L
30.0 mg/1-
Monthly
Grab
Effluent
Settleable Solids
0.1 ml/L
0.2 ml/L
Monthly
Grab
Effluent
Turbidity2
Monthly
Grab
Effluent
pH
Between 6.8 and 8.5 Standard Units
Monthly
Grab
Effluent
Conductivity
Monthly
Grab
Effluent
Arsenic
25" g/
Monthly
Grab
Effluent
Cadmium
2.,5- g/1_
Monthly
Grab
Effluent
Chloride
Monthly
Grab
Effluent
Chromium
Monthly
Grab
Effluent
Copper
Monthly
Grab
Effluent
Cyanide
0.5 g/L
Monthly
Grab
Effluent
Lead
12 g'/1.
Monthly
Grab
Effluent
Mercury
0.0.1�I_
'Mon hly
Grab
Effluent
Nickel
4 g L
",—Monthly
Grab
Effluent
Salinity
Monthly
Grab
Effluent
Selenium
36 g/1_
Months
Grab
Effluent
Silver
-lblonthly j
Grab
Effluent
Zinc
gonthly
Grab
Effluent
Fluoride
Q--Moncltlxl%
Grab
Effluent
Iron
�._._ Monthly
Grab
Effluent
Total Phosphorus'
Monthly
Grab
Effluent
'Dotal Residual Chlorine 4
Monthly
Grab
Effluent
Acute Toxicity's
Quarterly
Grab
Effluent
NOTFES:
' Sample Locations: Effluent shall be defined as a point just prior to discharge. '
S The discharge shall not cause the turbidity of the receiving water at the discharge point to exceed 25 NTU. If the turbidity exceeds these levels due to natural background
conditions, the discharge shall not cause any increase in the turbidity of the receiving water.
5 Total Phosphorus monitoring is required only if phosphate containing chemicals are added during the treatment process.
4 Total Residual Chlorine monitoring is required only if chlorine or chlorine derivative is added during the treatment process.
5 Acute Toxicity Monitoring P/F (Mysidopsis bahia) @ 90%; January, April, July, and October; See Condition A(2) of this permit; Samples shall coincide with sampling for other
parameters..
VALUES REPORTED BELOW QUANTITATION LEVELS SHALL BE CONSIDERED COMPLIANT WITI I TI IE PERMIT.
ALL SAMPLES COLLECTED SHALL BE OF A REPRESENTATIVE DISCHARGE.
TI IERE Sl-IALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTi [Ell TI IAN TRACE AMOUNTS.

Permit No. NCO083909
SUPPLEMENT TO EFFLUENT LIMTATIONS
AND MONITORING REQUIREMENTS
SPECIAL CONDITIONS
A. (2). ACUTE TOXICITY PASS/FAIL MONITORING: (QUARTERLY)
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 shall 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 TGEJE.
Additionally, DXVQ 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, NC 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, monthly
monitoring shall begin immediately until such time that a valid test is submitted. Upon submission of a valid
test, monthly testing shall 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.

To: Permit Files for NCO083909 and
NCO070157
From: Steven Pellei, Permit Writer
Date: October 22, 1999
Subject: WARO comments on RO draft permits
I spoke with Roger Thorpe on October 10, 1999 and confirmed that the Washington
Regional Office had reviewed copies for the drafts for NCO083909 (Rodanthe RO) and
NCO070157 (Kill Devil Hills RO).
Roger did not recall any comments from the WARO, nor were any received at the
NPDES Office. Roger gave a verbal approval of the issuance of the permits.

State of North Carolina
Department of Environment
and Natural Resources
Division of Environmental Health
James B. Hunt, Jr., Govemor
Wayne McDevitt, Secretary
Linda C. Sewall, Director
February 25, 1999
MEMORANDUM
TO: Mr. David Goodrich
NPDES Permits Group Leader
Discharge Permits Unit
Division of Water Quality
FROM: Linda Sewall, Director
Division of Environmental Health
SUBJECT: Draft National Pollutant Discharge
Elimination System Permit
Rodanthe/Waves/Salvo Wa ter Treatment Plant
Off of NCSR 12
Rodanthe
Dare County
Permit No. NCO083909
Reference is made to the above mentioned
System Permit. We have reviewed this permit
discharge will not adversely affect any SA waters.
NCDENR
NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
Draft National Pollutant Discharge Elimination
application and determined that the proposed
We concur with the issuance of this proposed permit provided the facility is operated and
maintained properly, the stated effluent limits are met prior to discharge, and the discharge does not
contravene the designated water quality standards.
If we can be of further assistance, please contact us.
LS/glc
cc: Hornlean Chen
M. P. Bell
George Gilbert
P.O. Box 29534, Raleigh, North Carolina 27626-0534
Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper

l6)
State of North Carolina
Department of Environment
and Natural Resources
Division of Water Quality
James B. Hunt, Jr., Governor
Wayne McDevitt, Secretary
A. Preston Howard, Jr., P.E., Director
MEMORANDUM
A�t�A&4 * *TA
February 19,1999
To: Hornlean Chen
Division of Environmental Health
From: Kim Murphy
Subject: Review of DRAFT PERMITS
Rodanthe/Waves/Salvo RO Plant
Dare County
NCO083909
D E H N R
cmt- ai
c U
Please indicate below your agency's position or viewpoint on the DRAFT permit and
t� return this form by 3/29/99. If you have any questions on the draft permit, please contact
Tom Belnick at 919/733-5083 ext. 543.
RESPONSE:
This agency has reviewed the draft permit and determined that the proposed
discharge will not be sufficiently close to any existing or know proposed
public water supply intake so as to create an adverse effect on water quality.
We concur with the issuance of this permit provided the facility is operated
and maintained properly, the stated effluent limits are met prior to discharge,
and the discharge does not contravene the designated water quality standards.
Concurs with issuance of the above permit, provided the following conditions
are met:
Opposes the issuance of the above permit, based on reasons stated below, or
attached:
Signed /,Z— Date: 3
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone [phone] FAX [phone]
An Equal Opportunity Affirmative Action Employer 50% recycled/ 10% post -consumer paper

03/24/99 14:55 FAX [phone] HOBBS UPCHURCH [a
Hobbs, Upchurch & Associates, P.A.
Consulting Engineers
20M S_ Cmahm Highway • P0. brawar 429 • Kill Devil Hills, North Carolina 27948
March 24, I999
Mr. Steven Pellei
NCDENR
NPDES Unit
Division of Water Quality
P.O. Box 29535
Raleigh: NC 27626-0535
RE: Comments on Drab NPDES Permits
Permit No. NCO085707 (Cape Hatteras RO Plant)
Permit No. NCO083909 (Rodanthe-Waves-Salvo RO Plant)
Pcrmit No. NCO070157 (Kill Devil Hills RO Plant)
Dare County
NUA No : DR9705
Dear Mr. Pellei:
A review of the Draft NPDES Permits referenced above has been made and additional
response is requested to the following issues:
• Comment is made to flowlimit_on each permit. We respectfitlly request the flows
be changed as follows:
RWS RO Plant: The actual discharge will be 302,400 GPD with 75%recovery
when the plant reaches its capacity of 1 MGD_ The plant is scheduled for
expansion to 2 MOD in the year 2005 at which time the total discharge will be up
to 604,800 GPD.
KD13 RO Plant: Presently the average discharge is 838,000 GPD and maximum
seen to date is 906,000 GPD. An additional RO train is scheduled to be added in
July 2001 at which time the discharge capacity would be 1-68 MGD_
s Dare County will request a review of the monitoring and limitations after 12 data
points have been collected. Daze County is presently sending out samples of the
concentrate for a full certified analysis of the parameters listed on the permit.
Kill Devil Hills. NC • Tolophonr>=441-3913 FAX=-441-2100 • e-mail:hua-Wh®beachlinkcom
Southem Pines Myrtle Beach • Raleigh
i'I

03/24/99 14:55 FAX [phone] HOBBS UPCHURCH tN0f
Mr. Steven Pellei
HUA No.: DR9705
March 24, 1999
Page 2
The effluent concentration for the mysid shrimp test has changed from 80% to
90% at the Cape Hatteras RO plant What is the justification? Dare County has
p"tepared detailed information and provided data to the Division of Water Quality
for the KDH RO plant which justified reducing the concentration test to as low as
25%. Was this taken into consideration in the new draft discharge permit?
The Cape Hatteras discharge permit references 16 locations surrounding the
discharge points which require salinity/conductivity monitoring. The diagram
was not attached which illustrates these locations. We are interested in this
diagram in that some of the monitoring points are 100 meters from the outfall
while the discharge point will be 100 fcct offshore.
Your response to these matters is greatly appreciated. If you have questions or if
additional information is needed, please do not hesitate to contact me.
Sincerely,
HOBBS, UPCHURCH & ASSOCIATES, P.A.
Eric T. Weatherly, P-E.
Division Manager
ETW/hb
Cc: Bob Oreskovioh, Director, Dare County Water Department
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A, (1). EFFLUENT LIMITATIONS AND MONTTOR[NG REQUIREMENTS
PermiINo. NC0083909
Upon permit issuance and lasting.until expiration, the Permittee is authorized to discharge from ouifall(s) serial number 001 -
Reverse Osmosis Trealmeat Reject Discharge. Such discharges shaU be limited and monitored by the Permitiee as specified
below:
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ercury
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7-Samples shall be collected at some point afterexiting the RO unit and prior to discharge, unless otherwise noted.
T The discharge shallnot cause the lurbidity of the sound water at the discharge point loexceed 25 NTU. If the turbidity exceeds these levels due to
nalural background conditions, the discharge level cannot cause any increase in the turbidity in the receiving water.
a The pH shall not be less than 6.8 standard units nor greater than 8.5 standard units.
Total Phosphorus mon8oring is onlyrequired if any chemicals containing phosphates are added reztmenf process.
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6.5 x 10,
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ZIx lo- Bismuth 1.7 k IV
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Lithium
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293
6.6. to-,
Tmdmw ofrh. amoeph.rc,.aim.1•J y Okh.h
30
1d
19
235
315
s.2 x 10-4
pound%5.70 x 1010 mro.
40
2.4
4.)
260
313
IA It 10"
Bvid. or-..n1, mush., 0 ktm 39 mLI m..w
30
7.3 s Is--
113
270
330
4.1 * 10-,
44-3601m,27-224raL
60
1•I k 10.4
3.1 . IO'1
260
321
2.1 x 10-'
70
5.4 x Io-'
L2 A 10"
210
293
6.6 x 10-1
3o
1.0 x 101
2.1 x IQ"
190
280
3.2 x 10'I
90
1,9 x 10.'
4.0 x 10-,
210
295
2.0
100
4.2 x 10.4
LO it 10"'
260
315
10.0
tea
Iq x 10-'
2.9 x la-•
270
2m
330
40.0
120
3.3 x 19'1
5,0 . 10•'
134
270
37D
IS . 101
IN
1.5 4 mil
LO . to'
390
lio
No
4.0 x 10,
140
7 . 10"
7.0 x 10"'
450
370
430
IA • 10'
130
3 . 10-'
3A . IQ--
110
4M
460
2.s x 10
160
2 . IQ-'
I.3 a 10"°
170
470
410
5.0 x 10'
14-10
7

APR. E. 1999 9,E4AM OXFORD LABS
OXFORD
aboratorles
nc,
DATE
TO:
FROM:
-- x
NUMBER OF PAGES: -'
'] 1c .4AJ4 G �..f[� Cvnn4YS /fRt ©ter .6 -:�'ti! he.
NO.7983 P.
Analytical and Consul
1316 Sout
W4raingto
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Fax
SHEET
1'
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(INCLUDES COVER SHEET)
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t
N
r, I
�� �- - 7- Co
e A. (1). EFFLUENT LIMITA1-10NS AND a ONTTORTNG REQUIREMENTS
a
Permit No. NM93909
Upon permit issuance and lasting until expiration, the Permiltee is authorized to discharge from outfaIl(s) serial number 001 -
Reverse Osmosis Treatment Reject !Discharge. Such discharges shall be limited and monitored by the Fermitlee as specified
beloxv:
LffLUENTCHARACTIER
AP
aft: :„ _ ',..,.. '
'•..'.:_
on Y
'r "Average
Weekly..a
sure
amp-e:_=
�: amNa..
Average
Maximum ,;
Frequency`_,<<_
.! TYpe _':
"Locations
How
a aspen a Solids
on muous
eco m
uen
e ea o l s }vgAz
m
mg
m
on y
Monthly
ra
ra
uen
Turbidly N SP�+ar+
ee no a
on y
ra
uen
uen
p
ee no a
on
uen
U Y
an y
r
n
rsenst
25
y
uen
eryum .E.3�o
ifr
o.060ga
on y
r
uen
mum
2.5 p9li
On
Uen
on a
D
EWMeW
ro rNum
en
Ili r+
Copper
1.5 g!I
n Y
ra
uen
YMr a
9f
0,S t�gA
on y
ra
uen
e
12.5 pgA
on y
ra
n
ercu y
�O
C-012 p9A
Y n
ra
uen
e
4.2 µgA
on y
a
uen
a m y
eemum
36 p9A
Nbroluen
Monthly
ra
ver e
0.C*0
rMnInly I
Grabuen
Inc
43 trgil
MUMMY
tiralluen
Fluoride
o
uen
ron
on yra
entR05dharus
o(;hlonnez
Monthly-
ra
uen
----EjVLj—eff—
Monthly
Grab
IT o rag -
I Samples shall be collected at some point after exiling the RO unit and prior to discharge, unless otherwise noted.
' The discharge shall not cause the turbidity of the sound water at the discharge point to exceed 25 NTU. II the iurbidily exceeds these levels duelo
nahrral background conciltion5, the discharge level cannot cause any increase in the turbidity, h the receiving water.
3 The pH shalt not be less than 6.8 standard units nor ureatpr than a A
0
m
w

E. 1994 9:95AOXFORD LABS NO 7
$I�MENTS IN SEA WATER
I A. Demayd
The clemmH in sea water are
eel in decreadne evmete eeeeenuedon. These tr6 average c99eeRRalian4
and olerc adI bC varat50m in ro
,
den as 4 lanedov or tbel«agog rho» th9 ramplawn aenaegd,
Gaaemrirm
cotaantntlan Catxuatmtan
Element
(mg/II)
84meat
(mg/l) Element (mg/1)
oxygen
3.57 x 10r
Iron
1 x 10'1 Selenlum 9 .10'.
Hyaroacn
1.04-IV
Indium
4c2 xl0" Germanium 7 x)0`r
Chlorite
I.Ao"IV
Molyhdeaum
1 x10'1 Xcon 3.2xIV,
Sodlum
1.05 x IV
zinc
I x IV Chromium 5 x I"
Magoeaitrm
135 x 10'
Nickel
5.4 x 1071 Thadum 5 x lo-1
Sulfur
0.05x to.
Arunle
3 x10`1 Gallium 3 xlor.
Cak:lum
I.OD x 10'
Capper
3 x IV slur , 3 x IV
POtmdum
3,001c 10'
TN
3 x 10" Lead 5 x to"
Bromine
6.3 A10,
Uraviam
3 x10'. 2r.eauium 2.2hro-
Carbon
2.8 x1N
Xrypmd
2.5x IV BHmuth 1.7x10"
Srrn..rium
a.1 to.
Maw.a
2 xt0" L.eorummma 3.2x IV
Roma
4.4 nr10a
Vanadium
2 x10" Gold 1.1x10"
M..
3 xa0•
TNmium
1 x19-v Niobium I -IV
Nugent;
1.3 xt01
Igym
3 x10" Thalflum <1 x10" .
Argon
p xlo-r
Cerium
4 x1D" Hafnium <8 x10"
Ni60gw
S xlo•1
Antimony
3dx10" Helium 6.9xlo-e
Llm3udl
1.8 x 10-1
Silver
3 x 10'1 Tanralum <24 at 10"
Rubidlum
".t IV-
Yttrium
3 x10" 0ayh:um 4 =a0^
Phosphorus
7 xIV
c"t
VEIN" Proluactinium 2 x10"
Iodine
6 xto"
Nean
1.4x10" Radluen 0 x10.a
Barium
3 K l0r.
Cadmium
1.11r IV Radon 6
Aluminum
1 =IV'
7lmprern
1 xltY
THE PH OF
IATURAL MEDIA AND rf8 RELATION
TO THE
RECIPITATION OF HYDROXIDES
R-Preatal from '1
iWiPhan or Ceoehernbry' (10111 nigh the pr.nwdon ar
Bryn Malors.aulh
r, sad John Whey, and Sons publishers.
PH
Preciph
ioe orhydraaldrs
Natural might
pH
III
Not
ium
II
10)
Alkall16,11
10
91
Diva
ME manganese
I0
0)
Seawater
17
at,.
iron
River wamr
7
6
Z.nc
peer
Rain wafer
6
1
AEU
mrm
5
4
Peat wafer
4
31
1m.
Icon
Mine rmmi
3
Add Ihemml mhnpr
I2
1
PROPERTIES OF THE EARTHS AT
AOSPHERE
VXLOCM OF SEISMIC
AT ELEVATIONS UP TO 160 KnA
INETERS
Theaversteatmeyhere apw 1601an
baud on moursand
tensitydsm9btsina
Depth
Londtudloda
M racket nidw shave Wane sagas,
New Mexuro.
Ym
caadarrationalkm/a
dip,
Havms. Kali, and 1.aGar, Journal pf GsopM1yaid Raga
h. Mamb. 19SZ.
0-20
SA -5.6
Alit.
20-45
6.26.6.75
rude
empm•
err•
1100
12.5
log
amm
alum
lemly
24M
11.5
K
K
or
Mann
no
Pressure
t hennity
IN,. or)
(NI, 0)
wnd
Fm Path
Laval
mmHg
graaurrd
M - 29
M - 24
, sat
a nim')
ATMOSPHERIC AND N19MR
a
760
12W
290
45
4,S x l0'-
10
210
425
2"
10
1.9 x 10"r
20
42
92
210
as
1.6 x IQ--
Tom mma ar dx......nerg, m1lmataa 9y dabs
30
9.5
19
235
IS
4,2 x 10"
ponds, u5.70 x 101' tam.
40
2A
4A
7a0
IS
1A ,. t0'r
livid... o(extaae: ..iliahp 63 am, 39 mi,: mrraa
30
1.5 x 10'1
1.3
Z70
30
6.1 x 10"
44-360 it.. 21-224 mh
60
11 x 10"
3A x 10"
Mo
25
11 x 1a's
70
M x Ir,
1.2 x 10'1
210
93
6A x to*,
80
1.0 x 10 1
2.3 K lo'a
190
to
3.2 a to"
'
90
1.9 x 10'1
4,0 x 10"
210
95
2.0
100
4.2 = 10"
8.0 x to-'
240
15
10.0
110
14 x 10"
2.0 x 10'e
270
M
JD
A
120
3.5 K 16-'
5A x 10"I
330
270
5 x 10r
139
1.3 x to"
2A x 10-1
390
320
KIN140
7 x W.
7.0 a 19.6
450
370
010,
[4.0
.0 x 10'150
3 x to"
3A x W'
sic
420
.5 K IV
160
2 x 10"
1.3 K 10"170
4270
A x ID'
14-10
it
is

DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NCO083909
Facility Information
FacilityName:
are County - Rodanthe WIT NCO083909
Permitted ow (MGD):County:
are
aci ity ass:
egion ice:
WAKU
aci ity ermrt tatus:
Renewal
lopoQuad:
Stream Characteristics
ReceivingStream:
Pamlico Sound - Blackmar
Uut - Pasquotank Basin
Stream assi ication:
SA
(7.) Drainage Area (mi ):
NIA
u asm:
ummer c s
listed stream.
No
mter c s :
Support ating
t�sj Y eca
s : c
o :
- tidal
verage ow c s :
CHANGES TO PREVIOUS PERMIT
Parameters Affected
ProposedChanges
Basis for change(s)
ISS Monthly
Changed from 30 to 20 mg
are HQ W thu—s not
TSS Daily
Changed form 45 to 30 mg/1
Daily Max is 1.5 of monthly
Monitoring for parameters of
Addedas monthly
Per memo
concern
All parameters monitoring
Changed from weekly to
Per memo
monthly
Summary
The major changes related to this draft are the addition of monitoring for many parameters of
concern.
The other changes contained in this draft are to make this permit consistent with the 1/12/98
Reverse Osmosis/Membrane Process memo.
The current DMR data reflects monitoring for many parameters that have no water quality
standard, therefore no reasonable potential calculations were performed.
A call placed to Marine Fisheries confirmed that the discharge is not into a Primary Nursery Area.
(PNA).
For the following parameters listed in the table:
• Conventional parameters are reported by the permittee in the renewal application,
• Toxicity is from ESB's 12/15/98 Data Summary from March 1996 to October 1998,
PARAMETER DMR RESULTS AVERAGE ACTION
ow t>-9T5-f0-769U- 0.05U9 140T110- j^tl-A,ll vvw;+- D'F 0,3 m&b
TSS (mg/1) 1.5 to 10.0 3.7 None
TRC (mg/1) 0.0 to 0.0 0.0 None
Turbidity (NTU) 1.0 to 2.04 1.43 None
Set.Sol (ml/I) 0.0 to < 0.1 N/A None
Chloride (mg/1) 1664 to 1860 1746 None
Iron (mg/1) 0.12 to 0.187 0.1511 None
Version: February 1 Z 1999 Page I

DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NC0083909
Copies of the following are attached to provide further information on the permit development:
• Existing permit effluent sheets with changes noted (existing facilities only)
• Draft Permit
Proposed Schedule for Permit Issuance
Draft Permit to Public Notice: 3/10/99
Permit Scheduled to Issue: 4/26/99
\*'A*A ■ 'A1��A A�
If you have any questions on any of the above information or on the attached permit, please
contact Steve Pellei at [phone], extension 516.
NPDES Recommendation by:
Regional Office Comments
Regional Recommendation by:
Reviewed By:
Date:
Regional Supervisor:
Date
NPDES Unit:
Version: February 12, 1999 Page 1

A. (1). EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
IMOM 0Zrm►[K1I1i 13111161
Upon permit issuance and lasting until expiration, the Permittee is authorized to discharge from outfall(s) serial number 001 -
Reverse Osmosis Treatment Reject Discharge. Such discharges shall be limited and monitored by the Permittee as specified
below:
EFFLUENT CHARACTERISTICS
LIMITS
MONITORING REQUIREMENTS
Monthly
Average
a e
Wane/
ai y
Maximum
MeasurementSample
Frequency
Type
Sample
Location'
Flow
Continuous
ecor rng----Effluent
--7GraF--
otal Suspendedo i s
mg
mg
on y--
Settleable Solids
0.1 m
m
on y
ra
uen
Turbidity
ee no a
on y
ra
uen
p
ee no a
on y
ra
Effluent
ConductivityMonthly
Grab
Effluent
rsenic
2S
on y----Grab---
uen
ery wm
O•D6
on y
ra
uen
a mium
Monthly
ra
uen
---EffFu-en-F--
Chloride
Monthly
Grab
_uFro—mium
Zp
on y
ra
uen
opper
on y
ra
Effluent
Cyanide
S
on y
ra
Fue-nT—
Lead
Monthly
Grab
Effluent
ercury
O.o t
Monthly
ra
uen
ice
4. z
Monthly
ra
uen
a mi y
Monthly
ra
uen
eemum
6
on y
ra
uen
ever
Monthly
raEffluent
Zinc
Monthly
ra
uen
Fluoride
Montnry
Grab
Eff uen
ron
on y
ra
uen
Total Phosphorus
on y
ratrnuent
Total Residual GhlorineO
mommy
UraD
trnuent
Notes:
samples shall be collected at some point after exiting the RO unit and prior to discharge, unless otherwise noted.
2 The discharge shall not cause the turbidity of the sound water at the discharge point to exceed 25 NTU. If the turbidity exceeds these levels due to
natural background conditions, the discharge level cannot cause any increase in the turbidity in the receiving water.
a The pH shall not be less than 6.8 standard units nor greater than 8.5 standard units.
a Total Phosphorus monitoring is only required if any chemicals containing phosphates are added during the treatment process.
s Total Residual Chlorine monitoring is only required if chlorine is added_
All samples collected should be of a representative discharge.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

To: Permits and Engineering Unit SOC Priority Project: Yes No X
Water Quality Section If "Yes", SOC No.
Attn: Steven D. Pellei
Date: December 16, 1997
NPDES STAFF REPORT AND RECO2AENIDATION
County Daze
Permit No. NC0083909
PART I - GENERAL INFORMATION
1. Facility and Address: Dare County Regional Water System
(Rodanthe/Waves/Salvo R.O. WTP)
23697 Highway 12
Rodanthe, NC 27968
P.O. Box 500 (Mailing address)�,N
2. Date of Investigation: December 11, 1997 `F
3. Report Prepared b QR�^` �-7
y: Brad Shaver
4. Person(s) Contacted and Telephone Number(s): ngii�R
Plant Superintendent
\\ 9 -987-1111
�25�J 9-987-1112
5. Directions to Site: Located just off NC Highway 12 in Rodanthe, Dare
County.
6. Discharge Point(s); List for all discharge points:
Latitude:75°28'12"N Longitude:35°35'43"W
Attach USGS map extract and indicate treatment facility site and
discharge point on map.
USGS Quad No. USGS Quad Name: _Rodanthe_
7. Site size and expansion area consistent with application? Yes X No
If "No", explain:
8. Topography (relationship to flood plain included): Site is flat and
approximately 3-8 feet above mean sea -level.
9. Location of nearest dwelling: The nearest dwelling is approximately 50
feet from facility.
10. Receiving stream or affected surface waters: Blackmar Gut to Pamlico
Sound.
a. Classification: Class SA
b. River Basin and Sub -basin No. Pasquotank, 03-01-55 ✓ ()'12
0.) I l VA 6D
Pam, d.�q 7 Vk&

C. Describe receiving stream features and pertinent downstream uses:
The receiving stream has been partially altered to act as a small
harbor for several commercial vessels which offload fish catches,
onload fuel and supplies, and perform routine boat repair and
maintenance. Additionally, there is a small boat launching ramp.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1• a. Volume of Wastewater to be Permitted:
> 0.05 MGD
b. Current Permitted Capacity: The Dare County Reverse Osmosis WTP
at Rodanthe has no flow limitation in its permit.
C. Actual Treatment Capacity: N/A
d. Date(s) and construction allowed by Authorizations to Construct
issued past two years: October 25, 1994 (Begin Construction)
March 7, 1996 (Finish Construction)
e. Description of existing or substantially constructed wastewater
treatment facilities: None
f. Description of proposed wastewater treatment facilities: None
g. Possible toxic impacts to surface waters: N?A
h. Pretreatment Program (POTWs only):
In development Approved
Should be required Not needed __
2. Residuals Handling and Utilization Disposal Scheme: Not applicable
a. If residuals are being land applied, specify DEM permit number:
Residuals Contractor:
Telephone Number:
b. Residuals Stabilization: PSRP PFRP Other
C. Landfill:
d. Other disposal/utilization scheme (specify): N/A
3. Treatment Plant Classification (attach completed rating sheet):
Class 0, no treatment of wastewater.
4. SIC Code(s): 4941
Wastewater Code(s):
Primary 22 Secondary
Main Treatment Unit Code:
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant Funds or are

any public monies involved (municipals only)? No
2. Special monitoring or limitations (including toxicity) requests: N/A
3. Important SOC,*JOC, or Compliance Schedule dates (indicate): N/A
Activity Date
Submission of Plans and Specifications
Begin Construction
Complete Construction
4. Alternatives Analysis Evaluation: Has the facility evaluated all of the
non -discharge options available? Provide Regional perspective for each
option evaluated.
Spray Irrigation: Not feasible based on volume and operational
constraints.
Connection to Regional Sewer System: Not available.
Subsurface Disposal: Not practical based on volume of wastewater.
Other Disposal Options: N/A
5. Other Special Items:
PART IV - EVALUATION AND RECOM1ENDATIONS
The brine water concentrate discharge is gravity flow from the water
treatment facility to the discharge point at Blackmar Gut into the
Pamlico Sound.
It is recommended that NPDES Permit NCO083909 be reissued to this
facility.
Signature of report preparer
Water Quality Regional Supervisor
Date
NPDES Permit Staff Report
Version 10/92
4

To: Permits and Engineering Unit SOC Priority Project: Yes _ No_X_
Water Quality Section If "Yes", SOC No.
Attn: Steven D. Pellei
Date: December 16, 1997
NPDES STAFF REPORT AND RECOMMENDATION
County Dare
Permit No. NCO083909
PART I - GENERAL INFORMATIC
1. Facility and Address:
Dare County Regional Water System
(Rodanthe/Waves/Salvo R.O. WTP)
23697 Highway 12
Rodanthe, NC 27968
P.O. Box 500 (Mailing address)
2. Date of Investigation: December 11, 1997
3.
Report Prepared by:
Brad Shaver
4.
Person(s) Contacted
and Telephone Number(s):
Mr. Robert Crutchfield
Plant Superintendent
919-987-1111
919-987-1112
5.
Directions to Site:
Located just off NC
Highway 12 in Rodanthe, Dare
County.
6.
Discharge Point(s);
List for all discharge
points:
Latitude:75°28'12"N Longitude:35°35'43"W
Attach USGS map extract and indicate treatment facility site and
discharge point on map.
USGS Quad No. USGS Quad Name: _Rodanthe_
7. Site size and expansion area consistent with application? Yes _X_ No
If "No", explain:
8. Topography (relationship to flood plain included): Site is flat and
approximately 3-8 feet above mean sea -level.
9. Location of nearest dwelling: The nearest dwelling is approximately 50
feet from facility.
10. Receiving stream or affected surface waters: Blackmar Gut to Pamlico
Sound.
a. Classification: Class SA
b. River Basin and Sub -basin No. Pasquotank, 03-01-55

C. Describe receiving stream features and pertinent downstream uses:
The receiving stream has been partially altered to act as a small
harbor for several commercial vessels which offload fish catches,
onload fuel and supplies, and perform routine boat repair and
maintenance. Additionally, there is a small boat launching ramp.
PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of Wastewater to be Permitted: > 0.05 MGD
b. Current Permitted Capacity: The Dare County Reverse Osmosis WTP
at Rodanthe has no flow limitation in its permit.
C. Actual Treatment Capacity: N/A
d. Date(s) and construction allowed by Authorizations to Construct
issued past two years: October 25, 1994 (Begin Construction)
March 7, 1996 (Finish Construction)
e. Description of existing or substantially constructed wastewater
treatment facilities: None
f. Description of proposed wastewater treatment facilities: None
g. Possible toxic impacts to surface waters: N?A
h. Pretreatment Program (POTWs only):
In development Approved
Should be required Not needed _X_
2. Residuals Handling and Utilization Disposal Scheme: Not applicable
a. If residuals are being land applied, specify DEM permit number:
Residuals Contractor:
Telephone Number:
b. Residuals Stabilization: PSRP PFRP Other
C. Landfill:
d. Other disposal/utilization scheme (specify): N/A
3. Treatment Plant Classification (attach completed rating sheet):
Class 0, no treatment of wastewater.
4. SIC Code(s): 4941
Wastewater Code(s):
Primary 22 Secondary
Main Treatment Unit Code:
PART III - OTHER PERTINENT INFORMATION
1. Is this facility being constructed with Construction Grant Funds or are

any public monies involved (municipals only)? No
2. Special monitoring or limitations (including toxicity) requests: N/A
3. Important SOC, JOC, or Compliance Schedule dates (indicate): N/A
Activity Date
Submission of Plans and Specifications
Begin Construction
Complete Construction
4. Alternatives Analysis Evaluation: Has the facility evaluated all of the
non -discharge options available? Provide Regional perspective for each
option evaluated.
Spray Irrigation: Not feasible based on volume and operational
constraints.
Connection to Regional Sewer System: Not available.
Subsurface Disposal: Not practical based on volume of wastewater.
Other Disposal Options: N/A
5. Other Special Items:
PART IV - EVALUATION AND
The brine water concentrate discharge is gravity flow from the water
treatment facility to the discharge point at Blackmar Gut into the
Pamlico Sound.
It is recommended that NPDES Permit NC0083909 be reissued to this
facility.
Signature of report preparer
Water Quality Ronal Supervisor
/z/zz /I7
NPDES Permit Staff Report
Version 10/92