NC0086584_Issuance of Permit_19991112

State of North Carolina
Town of Environment
and Natural Resources
Division of Water Quality •A711174A
James B. Hunt, Jr., Governor
Bill Holman, Secretary
Kerr T. Stevens Director NCDENR
November 12, 1999
Mr. Tim M. Johnson, Town Manager
Town of Belhaven
P.O. Box 220
Belhaven, North Carolina 27810
Subject: Issuance of NPDES Permit NC0086584
Belhaven WTP
Beaufort County
Dear Mr. Johnson:
In accordance with your application for discharge permit received on November 17,
1998, we are forwarding herewith the subject 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 December 6, 1983 and as subsequently amended.
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, Post Office Drawer
27447, Raleigh, North Carolina 27611-7447. Unless such demand is made, this decision
shall be final and binding.
The following items were previously noted in the draft permit sent to you:
• A flow limit approximately equivalent to the maximum possible reject rate has been
installed.
• All parameters shall be monitored monthly, based on the size of the reject stream.
• Monitoring and limits for various parameters of concern have been installed to protect
instream water quality.
• Instream monitoring for Dissolved Oxygen has been included in the permit.
• Although it appears this discharge will not contain any phosphorus, a limit is being
installed in accord with the Phase II Nutrient Sensitive Waters agreement for the basin.
You may request that the Division review the need for the monitoring and limitations
after 12 data points have been collected. A reduction or elimination of monitoring may be
approved based upon the information you provide. As you are aware, the Division has
concerns with the various parameters that may be present in the reject stream and may
require the relocation or elimination of the discharge, based upon the effluent quality or any
adverse impact on instream water quality.
1617 Mail Service Center,Raleigh,North Carolina 27699-1617 Telephone[phone] FAX[phone]
An Equal Opportunity Affirmative Action Employer Visrr us ON THE INTERNET @ http://h2o.enr.state.nc.us/NPDES

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 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 the NPDES Unit at (919)
733-5083.
Sincerely,
Original Signed By
David A. Goodrich
Kerr T. Stevens
cc: Central Files
Washington Regional Office/WQ Section
DES Unit/Permit Files•
Point Source Compliance Enforcement Unit
Aquatic Toxicology Unit
Technical Assistance & Certification Unit

1
Permit No. NC0086584
STATE OF NORTH CAROLINA
TOWN 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, the
Town of Belhaven
is hereby authorized to discharge wastewater from a facility located at the
Belhaven WI?
0.4 miles north of U.S. Highway 264
Beaufort County
to receiving waters designated as an unnamed tributary to Pantego Creek in the Tar-Pamlico
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 December 1, 1999.
This permit and the authorization to discharge shall expire at midnight on November 30, 2004.
Signed this day November 12, 1999.
Original Signed By
David A. Goodrich
Kerr T. Stevens. Director
Division of Water Quality
By the Authority of the Environmental Management Commission

•
.
Permit No. NC0086584
SUPPLEMENT TO PERMIT COVER SHEET
Town of Belhaven
is hereby authorized to:
1. After receiving an Authorization to Construct from DWQ, operate a conveyance
system for a membrane filtration water treatment plant located at the Belhaven WTP,
0.4 miles north of U.S. Hwy 264,Beaufort County, and
2. Discharge reject water from a water treatment plant at the location specified on the
attached map into an unnamed tributary to Pantego Creek which is classified SC-
NSW waters in the Tar-Pamlico River Basin.

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Permit NC0086584
A. (1). E FFLUENT LIMITATIONS AND MONITORING REQUIREMENTS - FINAL
Upon commencement of the discharge and lasting until expiration, the Permittee is authorized to
discharge from outfall serial number 001 — membrane process reject. Such discharges shall be
limited and monitored by the Permittee as specified below:
EFFLUENT LIMITS MONITORING REQUIREMENTS
CHARACTERISTICS
Monthly Daily Measurement Sample Type Sample
Average Maximum Frequency Location1
Flow 0.22 MGD Continuous Recording Effluent
Total Suspended Solids 30.0 mg/I 45.0 mg/I Monthly Grab Effluent
Settleable Solids 0.1 m1I 0.2 ml/I Monthly Grab Effluent
Turbidity2 See note 2 Monthly Grab Effluent
pH3 See note 3 Monthly Grab Effluent
Arsenic 50 pg/I Monthly Grab Effluent
Beryllium Monthly Grab Effluent
Cadmium 5.0 pg/l Monthly Grab Effluent
Chromium 20 pg/I Monthly Grab Effluent
Copper Monthly Grab Effluent
Cyanide 1.0µg/1 Monthly Grab Effluent
Lead 25 mg/I Monthly Grab Effluent _
Mercury 0.025µg/I Monthly Grab Effluent
Nickel 8.3µg/I Monthly Grab Effluent
Salinity Monthly Grab Effluent
Selenium 71 pg/I Monthly Grab Effluent
Silver Monthly Grab Effluent
Zinc Monthly Grab Effluent
Fluoride Monthly Grab Effluent
Iron Monthly Grab Effluent
Total Residual Chlorine's Monthly Grab Effluent
Total Phosphorus5 1.0 mg/I Quarterly Grab Effluent
Acute Toxicity6 Quarterly Grab Effluent
Dissolved Oxygen Monthly Grab Upstream&
Downstream
Notes:
I Samples shall be collected at some point after all treatment units and prior to discharge, unless
otherwise noted.
2 The discharge shall not cause the turbidity of the 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.
3 The pH shall not be less than 6.8 standard units nor greater than 8.5 standard units.
4 Total Residual Chlorine monitoring is only required if chlorine is added.
5 Total Phosphorus monitoring shall be increased to monthly if any chemicals containing phosphates
are added during the treatment process.
6 Acute Toxicity Monitoring P/F (Mysidopsis bahia) @ 90%, during the months of January, April,
July, and October. See Part I, Condition A. (2.). Further studies will be required to determine the
cause of toxicity, if any. The collection of samples shall coincide with the sampling of other
parameters.
Values reported below quantitation levels shall be considered compliant with the permit.
All samples collected shall be of a representative discharge.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

Permit NC0086584
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 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).
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&
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: NC DENR / DWQ
Environmental Sciences Branch
1621 Mail Service Center
Raleigh, North Carolina 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 any single quarterly monitoring indicate a failure to meet specified limits, then monthly monitoring
1 will begin immediately until such time that a single test is passed. Upon passing, this monthly test
requirement will revert to quarterly in the months specified 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 single test is passed. Upon passing, 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 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.

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PUBLIC NOTICE
t STATE OF NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT
COMMISSION
POST OFFICE BOX 29535
RALEIGH,NORTH CAROLINA 27626-0535
NOTIFICATION OF INTENT TO ISSUE A
STATE NPDES PERMIT
On the basis of thorough staff review and applica-
tion of Article 21 of Chapter 143,General Statutes
of North Carolina, Public Law 92-500 and other. - - — . --- --- ----
lawful standards and regulations,the North Caro-
lina Environmental Management Commission pro-
- poses to issue a permit to discharge to the per-
sons listed below effective 11/8/99 and subject to
special conditions.
Persons wishing to comment upon or object to the
proposed determinations are invited to submit
same in writing to the above address no later
than 10/22/99. All comments received prior to
that date will be considered in the formulation of
final determinations regarding the proposed per-
mit. A public meeting may be held where the Di-
rector of the Division of Environmental Manage-
ment finds a significant degree of public interest in
a proposed permit.
A copy of the draft permit is available by writing or
calling the Division of Environmental Manage-
ment, P.O. Box 29535, Raleigh, North Carolina
I� 's \ 27626-0535,[phone].
\ The application and other information may be in-
1%0 spected at these locations during normal office
hours.Copies of the information on file are availa-
.- ble upon request and payment of the costs of re-
production. All such comments or requests re-
,� : garding a proposed permit should make reference
to the NPDES permit number listed below.
,.-- \ ..s,Date 9-15
' David A.Goodwich
diggr Ken T.Stevens,Director
vision of Environmental Management
V' Public notice of intent to issue a State NPDES
CL' •p€rmit to the following:
\......,___
1.NPDES No. The Town of Belhav-
en,P.O. Box 220,Belhaven, NC 27810 has ap-
plied for a new permit for a facility located at the
Belhaven WTP,Beaufort County.This water treat-
1.
ment facility proposes to discharge 0.22 MGD of r,
reject water from a membrane filtration process
from 1 outfall into an unnamed tributary to Pante-
go
Creek, a Class SC-NSW stream in the Tar-
Pamlico River Basin which has a 7010 flow of 0
cfs and a 3002 flow of 0 cfs.
9-22 1 tc

NPDES FACILITY AND PERMIT DATA 12/01/98 10 :46 :41
UPDATE OPTION TRXID 5NU KEY NC0086584
PERSONAL DATA FACILITY APPLYING FOR PERMIT REGION
FACILITY NAME> BELHAVEN, TOWN - WTP COUNTY> BEAUFORT 07
ADDRESS : MAILING (REQUIRED) LOCATION (REQUIRED)
STREET: 301 EAST MAIN STREET STREET: 0 .4 MI . NORTH OF U.S . HWY 264
CITY: BELHAVEN ST NC ZIP 27810 CITY: BELHAVEN ST NC ZIP 27810
TELEPHONE 252 493 3055 DATE FEE PAID: 11/17/98 AMOUNT: 400 . 00
STATE CONTACT> PELLEI PERSON IN CHARGE TIM JOHNSON
1=PROPOSED, 2=EXIST, 3=CLOSED 1 1=MAJOR, 2=MINOR 2 1=MUN, 2=NON-MUN 2
LAT: LONG: N=NEW,M=MODIFICATION, R=REISSUE> N
DATE APP RCVD 11/17/98 WASTELOAD REQS 48 / 3 / t7
DATE STAFF REP REQS 2 / 4 /co WASTELOAD RCVD D /4 / qq
DATE STAFF REP RCVD 9-/L0 /qa SCH TO ISSUE / /
DATE TO P NOTICE / / DATE DRAFT PREPARED b/ S /`[9
DATE OT AG COM REQS / / DATE DENIED / /
DATE OT AG COM RCVD / / DATE RETURNED / /
DATE TO EPA / / DATE ISSUED / / ASSIGN/CHANGE PERMIT
DATE FROM EPA / / EXPIRATION DATE / /
FEE CODE ( ) 1= (>10MGD) , 2= (>1MGD) , 3= (>0 . 1MGD) , 4= (<0 . 1MGD) , 5=SF, 6= (GP25, 64, 79) ,
7= (GP49, 73) 8= (GP76) 9= (GP13 , 34 , 30, 52) 0= (NOFEE) DIS/C CONBILL ( )
COMMENTS: FAX# [phone]/ENG=TYLER HIGHFILL-ARCADIS->782-5511
MESSAGE: *** ENTER DATA FOR UPDATE ***
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•
DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NC0086584
Facility Information
(1.) Facility Name: 'Town of Belhaven WTP NC0086584
(2.) Permitted Flow(MGD): 0.22 (5.) County: Beaufort
(3.) Facility Class: 1 (6.) Regional Office: WARO
(4.) Facility/Permit Status: New (7.) USOS Popo Quad:
Stream Characteristics
(1.) Receiving Stream: An unnamed tributary to Pantego Creek
(2.) Stream Classification: SC-NSW (7.) Drainage Area(mi2): 0.0
(3.) Subbasin: 030307 (8.) Summer 7Q10 (cfs) 0
(4.) 303d listed stream? No (9.) Winter 7Q10 (cis): 0
(5.) Support Rating Support Threatened (10.) 30Q2 (cis): 0
(Fecal&high Chl a)
(6.) IWC (%): 100% (11.) Average Flow(cfs): 0
Summary
This application is for a new discharge for a reject stream from a membrane filtration water
treatment plant for the Town of Belhaven.
The reject water will discharge to local canals that drain to the Pantego Creek, which, in turn, leads
to the Pamlico Sound. It has been listed as support threatened due to occasional coliform problems
• . and the presence of nutrients has been linked to the occasional algal blooms. This area is primarily
\P" estuarine and has experienced fish kills in the past. The Pamlico Sound itself has experienced
elevated chlorophyll a and several instances of low dissolved oxygen. To address these problem
the basin plan calls for a 30%reduction of TN& TP.
This permit is drafted in accord with the RO/MP memo dated January 12, 1998. This memo
\it )< recommends most monitoring to be monthly and includes monitoring for toxicity.
�
v/JJ J The WARO originally had concerns regarding possibly high concentrations of TOC,NH3-N and
cfr Fluoride being discharged to a possible zero flow stream. The applicant responded to these
concerns with additional information. In a follow up e-mail the WARO requested instream DO
and fluoride monitoring be added to the permit.
Copies of the following are attached to provide additional 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: 148 9/2-71g9
Permit Scheduled to Issue: 9 ( /v/c111

State Contact
If you have any questions on any of the above information or on the attached permit,please contact
Steve Pellei at(919) 715-6219.
NPDES Recommendation by:
Regional Office Comments
Regional Recommendation by:
Reviewed By:
Date:
Regional Supervisor:
Date
NPDES Unit:

Author: "Al Hodge" <Al [e-mail]> at Internet
Date: 7/20/99 10:27 AM
Priority: Normal
Receipt Requested
BCC: Steve Pellei at NRDEMCGP
TO: [e-mail] at Internet
Subject: NC0086584-Town of Belhaven-RO Discharge
Message Contents
HI Steven:
I raised concerns regarding the possibility of 02 uptake
problems in the proposed zero flow discharge stream in my staff
report of 2-19-99. I also voice concerns regarding fluoride
concentrations as they relate to WQ standards and toxcity. The
response recieved is adequate to assert that my concerns may not
happen. However, it is not conclusive that the problems will not
occur. I have discussed this point with the Town Manager and the
Engineering firm. I informed them that in my opinion the Town was
taking a change; but it was theirs to take.
I recommend that the effluent monitoring incluce up & down
stream monitoring for DO with the points set by the Regional
-Office. Also, fluoride monitoring in the effluent. I would also
recommend a condition be placed in the permit establishing that
there was concerns with these parameters "up front" and if WQ
standards are violated the discharge must be relocated or
elkai.nated.
Al Hodge
Washington Regional Office

A (1). E FFLUENT LIMITATIONS AND MONITORING REQUIREMENTS Permit No. NC0086584
Upon commencement of the discharge and lasting until expiration, the Permittee is authorized to discharge from outfall serial number 001 —
membrane process reject. Such discharges shall be limited and monitored by the Permittee as specified below:
EFFLUENT CHARACTERISTICS LIMITS MONITORING REQUIREMENTS
Monthly Monthly Daily Measurement Sample Sample
Average Average Maximum Frequency Type Location1
Flow 0.22 MGD Continuous Recording Effluent
Total Suspended Solids 30.0 mg/I 45.0 mg/I Monthly Grab Effluent
Settleable Solids 0.1 ml/I 0.2 ml/I Monthly Grab Effluent
Turbidity2 See note 2 Monthly Grab Effluent
pH3 See note 3 Monthly Grab Effluent
Arsenic 50 pg/I Monthly Grab Effluent
Beryllium Monthly Grab Effluent
Cadmium k A 5.0 pg/I Monthly Grab Effluent
Chromium I`;,'i _2011911_ Monthly Grab Effluent
r'
CoppeS 2.9 pg/I` ' Monthly Grab Effluent
`'�
Cyanide 1,V` ,�f. Monthly Grab Effluent
Lead �ro 25 pg/I Monthly Grab Effluent
Mercury c1,' ,.'r I 0.025 pg/I Monthly Grab Effluent
Nickel -Jr U 8.3 pg/I Monthly Grab Effluent
Salinity k.,\"k ,6 i.v./
o4 i Monthly Grab Effluent
Selenium ;r, t) 71_141 Monthly Grab Effluent
Silver W _
1 P .3 pg/I Monthly Grab Effluent
Linc \- (;,.. s: Monthly Grab Effluent
Fluoride Monthly Grab Effluent
Iron Monthly Grab Effluent
Total Residual Chlorine4 Monthly — Grab Effluent
Total Phosphorus5 1.0 mg/I Quarterly Grab Effluent
Acute Toxicity6 Quarterly Grab - Effluent
Dissolved Oxygen Monthly Grab U & D
Notes:
_�,) ; : f �S
P5 e.. c lits r s 1c-4+ e,, -�- h. e_ 1- .
1 Samples shall be collected ac me point after all treatment units, unless otherwise noted. U — Upstream. D — Downstream.
2 The discharge shall not cause the turbidity of the 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.
3 The pH shall not be less than 6.8 standard units nor greater than 8.5 standard units.
4 Total Residual Chlorine monitoring is only required if chlorine is added.
5 Total Phosphorus monitoring shall be increased to monthly if any chemicals containing phosphates are added during the treatment process.
6 Acute Toxicity Monitoring P/F (Mysidopsis bahia) @ 90%, during the months of January, April, July, and October. See PartI, Condition A(2). Further
studies will be required to determine the cause of toxicity, if any. The collection of samples shall coincide with the sampling of other parameters.
Values reported below quantitation levels shall be considered compliant with the permit.
All samples collected shall be of a representative discharge.
There shall be no discharge of floating solids or visible foam in other than trace amounts.

ARCADIS GERAGHTY& MILLER �1 •
Q: „3J �.
ARCADIS Geraghty&Miller,Inc
2301 Rexwoods Drive
Suite 102
Mr. Charles Weaver Raleigh
NPDES Unit North Carolina 27607-3366
North Carolina Department of Environment and Tel [phone]
Natural Resources Fax [phone]
Post Office Box 29535
Raleigh,North Carolina 27626-0535
WATER AND WASTE
Subject: MANAGEMENT
NPDES Permit Number NC0086584
Town of Belhaven, Beaufort County
ARCADIS Geraghty&Miller Project Number NC039341.0040
Dear Mr. Weaver: Raleigh,NC,
25 June 1999
In response to Steve Pellei's comments faxed via Al Hodge at the Washington
Regional Office on March 26, 1999, for the subject project, please find enclosed the Contact:
NPDES Staff Report and Recommendations and three copies of our Responses to Tyler Highfill
NPDES Permit Review Comments.
Please let us know if you need additional information.
Extension:
Sincerely, 138
ARCADIS Geraghty&Miller, Inc.
VVI
i /
Tyler W. Highfill, P.E.
Enclosures
/mre
Copies:
Al Hodge with enclosures
Tim Johnson with enclosures
John Maynard
Our ref.:
N CO3 9341.0040/cw-I et.d oc.doc

•
RESPONSES TO NPDES PERMIT REVIEW COMMENTS 22 June 1999
WATER TREATMENT SYSTEM IMPROVEMENTS
NPDES APPLICATION NO. NC0086584
TOWN OF BELHAVEN, NC
ARCADIS PROJECT NO. NC039341.0040
Back-up calculations, lab results, cost estimates, etc. for the responses to each comment are
attached at the end of this summary for reference.
COMMENT 1: I have concerns regarding a BOD from this discharge. It has come to my attention k
that the source water is high in Total Organic Carbon (TOC). The concentrations are potentially
high with the reject water being concentrated four times to source water. I request that the
applicant address this trough testing.
RESPONSE: A concentrate sample is unavailable at this time. We have been unable to
locate a vendor or laboratory that is willing to produce a concentrate sample for a
reasonable costs. A demonstration pilot unit could be brought on-site to test the raw
water source a minimum estimated cost of $33,000.
The Standard Methods procedure of analysis of samples with a high BODS includes dilution
of the sample prior to performing the laboratory test. The measured BODS is then
multiplied by the appropriate concentration factor to get the BODS of the original waste
sample. Since a sample of the reject stream is not available,we have collected BODS data
on the raw water and multiplied by appropriate concentration factors to estimate the BODS
of the actual reject waste. The result of the BODS test indicated oxygen demands below
detectable limits which projects to a concentrate BODS below detection limits.
In addition, a raw water sample was concentrated in the lab to a volume 25% of its original
volume to replicate a WTP recovery of 75%. The concentrated sample was tested for BODS
and the results also indicated an undetectable oxygen demand.
Based on these parallel tests we conclude that the reject stream should not impart a
biochemical oxygen demand on the receiving body.
COMMENT 2: I also have concerns with an oxygen uptake exerted from the NH4 in the discharge.
The oxidation occurs at a ratio of 1.502 to NH4. The oxidation process requires the autotrophic
organism Nitrosomonas that occurs naturally.
RESPONSE: A summary of the nitrogen cycle is outlined below for reference. The presence
of naturally produced ammonia requires the presence and complete degradation of
proteins and organic matter. The process of manufacturing agricultural fertilizer is also a
source of ammonia nitrogen. Since the Belhaven wells are not under the influence of
surface waters, these surface sources of ammonia should not be present in the source
water.
Nitrogen Cycle:
Protein 4 Organic Nitrogen 4 Ammonia 4 Nitrite 4 Nitrate 4 Nitrogen Gas
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We have tested 5 samples for nitrate and nitrite which have all returned results below
detection limits. We have tested 7 samples for ammonium ions which have returned 6
results below detection limits and one result at 0.01 ppm above detection limits. The table
below is a summary of samples analyzed.
SAMPLE CONCENTRATION SAMPLE LOCATION
DATE (as NH3-N) & LAB
1/20/98 <0.2 ppm Test Well (Oxford Labs)
8/13/98 0.8 ppm (1) Test Well (Chemical and
Environmental Testing)
4/20/99 <0.2 ppm Wel No. 2 (Oxford Labs)
4/20/99 0.56 ppm (2) Wel No. 2 (Oxford Labs)
4/25/99 0.11 ppm (3) Wel No. 2 (Oxford Labs)
4/25/99 <0.10 ppm Wel No. 2 (Oxford Labs)
4/25/99 <0.10 ppm Wel No. 2 (Oxford Labs)
4/25/99 <0.10 ppm Wel No. 2 (Oxford Labs)
4/25/99 <0.10 ppm Wel No. 2 (Oxford Labs)
Footnotes:
(1) Apparent outlier(4.9 times higher than test set average)
(2) Sampler dumped out preservative, therefore invalid result
(3) 5 samples taken at 30 minute intervals on 4/25/99
The samples noted with footnotes 1 and 2 in the table above have been excluded in the
analysis of ammonia in the raw water. Of the remaining 7 samples analyzed, only one was
detected with ammonia. The average ammonia concentration is therefore 0.016 ppm NH3-
N.
Our conclusion is that there is not enough ammonium ions in the raw water to impact
the receiving stream.
In case there is concern from the NCDENR, we have performed the following analysis of
reaction kinetics (see also attached back-up calculations):
Theoretical reaction kinetics indicate a cell growth time of 21 days(504 hours)
based on 0.064 ppm NH3-N in the reject stream (expected raw water ammonia
concentration of 0.016 ppm concentrated 4 times). The receiving body has a 1
foot drop over the 5000' distance to Pantego Creek. Using normal depth
procedures on a typical ditch cross section, the average velocity is projected at 0.4
feet per second. The time of travel to the creek is therefore 3.5 hours which is more
than 140 times shorter than the time required for nitrofier bacteria growth (Ref. EPA
Process Design Manual for Nitrogen Control, 1975).
Based on the raw water sampling and nitrofying baceria kinetics, we conclude that
there will not be a significant nitrogenous biochemical oxygen demand on the receiving
body due to discharge of the reject stream.
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Unc/ivrvneeen 093474oweevmveaymTn enonesponfe to nodes tommmotc.doc 2/3

COMMENT 3: It appears that Ropers Ditch; the drainage structures name at Pantego Creek is
partially plugged at the mouth. I have concluded this because of the water level in the ditch year
round.
RESPONSE: We incorrectly identified the route from the discharge point to Pantego Creek.
Upon review of this item with the Owner, they have informed us of the actual flow path to
Pantego Creek.
We have modified the USGS map accordingly and it is attached for review.
•
COMMENT 4: Perform engineering evaluation of alternative that would pump the reject stream to
Pantego Creek.
RESPONSE: An engineering evaluation of this alternative has been performed and is
attached. The analysis shows the estimated total present value to implement this
alternative at $412,000.
•
The cost of this alternatives makes it cost prohibitive to the Town.
COMMENT 5: The fluoride water quality standard is 1.8 ppm with projected concentrations as
high as 2.1 ppm has been shown to have toxic affects at other Nanofiltration filtration reject
discharges.
RESPONSE: The projection of reject fluoride concentration was based on a combination of
the highest sampling result, worst case rejection modeling, worst case recovery projections,
and a 10% degradation in the water supply quality(compounding worst case scenarios).
Based on multiple samplings, the projected average fluoride concentration in the raw water
is expected to be 0.39 ppm.
In a more realistic estimate using the average raw water fluoride concentration, worst case
rejection estimate for fluoride (i.e. 75% ion rejection)and the planned plant recovery of
75%, the estimated fluoride concentration in the reject is projected to be 1.2 ppm which is
67% below the water quality standard.
Based on sampling and above more realistic modeling we do not expect fluoride to be
a water quality concern at this membrane plant.
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Wnc,-w,1d.toWvra139341404npWtPA81p.m,IttengV.Wom.to nod..con.n.Ms.E« 3/3

PAGE
0 SUBJECT: BY: DATE:
ARCADIS CHKD: DATE: SHEET
GERAGHTY&MILLER JOB NO: /
l3ACVVP Foe
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PHONE CALL SUMMARY
8 APR 99
RE: Concentrate Testing for NPDES Comments
Water Treatment System Improvements
Town of Belhaven, NC
Arcadis Project No. NC039341.0040
TYLER HIGHFILL spoke with STUART McCLELLAN, Applications engineer with FilmTec Membranes
Phone: [phone]
Tyler called to ask if Mr. McClellan knew of any procedures for creating an actual concentrate
sample without a pilot test. Mr. McClellan is very familiar with this project and has been in the
membrane business for 20+ years. He does not know of any way to make a concentrate stream
short of setting up a pilot unit in the field.
He did not know of any correlation between TOC and BOD or similar. He said membrane people
are typically not concerned with TOC and BOD in WTP membrane applications so there is not much
data out there.
He suggested running the BODS on the raw water source and applying a concentration factor. If
the organic carbon is in the volatile form (gas) it will pass through the membrane. If it is not, it will
be rejected at nearly 100%.
�l.
Page:
owr 9xi.aow_wm.phom.aoc 1/1

PHONE CALL SUMMARY
8 APR 99
RE: Concentrate Testing for NPDES Comments
Water Treatment System Improvements
Town of Belhaven, NC
Arcadis Project No. NC039341.0040
TYLER HIGHFILL spoke with ROGER OXFORD of Oxford Labs
Phone: [phone]
Tyler called to ask if Oxford Labs could emulate our membrane process in the lab with a grab
sample. Mr. Oxford has never done such a test and does not think it is possible.
Page:
g amV03n.sowiko..n.e..doc 1/1

Analytical and Consulting Chemists
- - 40 XF O R D 1316 South Fifth Street
aboratories DATE RECEIVED 04-21-99
Wilmington, N.C. 28401
DATE REPORTED 04-29-99 [phone]
nc. 99W2236 Fax[phone]
PAGE 1 OF 1
.111Zie Celt vet;
ARCA23D
IS 01REXWOODSHTY &DR. /SUITEER 200 P . O. 4 4/1 � �
� 1999
RALEIGH, NC 27607 ARCADES GQ�g6ty&
miner
ATTENTION: TYLER HIGHFILL
SAMPLE DESCRIPTION: WELL 2 4=20-99 BELHAVEN
1 . WELL 2 #1
2 . WELL 2 #2 LAB CONCENTRATED
3 . WELL 2 #21
RESULTS
1 2 3
BODS , as 02 , PPM <1 <1 X
pH (Lab) 7 . 40 10 . 2 7 . 30
Total Organic Carbon , as C , PPM 12 . 2 43 . 4 X
Ammonia Nitrogen, as NH3-N, PPM <0 . 20 <1 . 75 0 . 56
C2oQ !1,
K N + MITH, SENIOR ANALYST 'f
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.
ARCAD1S CHKD: DATE: SHEET
GERAGHTY&MILLER JOB NO:
BACKUP FO tE
COMMDUT 2
k.

• e
BELHAVEN RAW WATER ANALYSIS SUMMARY
WELL N2 t 9ll a2 WELL 12 WELL 02 WELL SG WELL#2 WNW
4/2599 4/25/99 4/25/99 4/25/99 4/25/99 CONC.• WELL 62 WELL N2 TEST WELL TEST WELL TEST WELL WELL 01 WELL 02 WELL 11 WELL 62 MATER
CONSTRU/WT UNITS 10:40 AM 10:10 AM 0.40 AM 9:10 AM 0140 NA 4/20199 4/20199 4/2099 913198 5/19/99 1/2099 d12191 5/12194 10'5/93 1015/93 GOAL
Nminun ppm 0.1
x Monona ppm as Nl13-N <0.10 <0.10 <0.10 <0.10 0.11 <1.75 <0.2 0.56'• 0.8 .0.2
Antimony ppm <0.003 <0.006
Anomie pan <0.01 <0.005 <0.005 <0.05
x Bari= ppm 0.02 0.17 0.019 0.02 0.02 <2.0
Beryllium pan <0.002 <0.004
Bronide ppm <as 0.076 0.05 0.06 <9.4 <0.4 <0.2
Cadmium pan <0.001 <0.001 .0.001 .0.001 <0.001 <0.005
a Calcium ppm 55 69.9 63 66.5 87.5 see hard.
a Chloride pan 14 17 13 12 12 1211 <200
Chards-1m Ppm .0.005 <0.005 <0.005 <0.1
Copper ppm <0.01 <0.003 0.065 <1.0
Cyanide ppm <0.005 .0.2
x Fluoride ppm 0.3 0.52 0.34 1
a Hydodde Ion ppm
x Iron pan 0.12 0052 0.07 0.512 0.35 <0.3
x Iron as Fehr.. ppm
Lead ppm <.005 <0.003 0.005 <0.015
x Magnesium Pan 17.4 18.67 19.5 18.5 18 17.5 18.2 see hard.
a Manganese ppm 0.008 <0.01 0.006 <0.05
Mercury PPm <0.0002 <0.0002 <0.0002 <0.302
Nebel ppm <.010 <0.1
x Write ppm <0.1 <1 <0.1 <10
Nitrate ppm as NO3-N
<0.1 <0.1
Write ppm <0.1 <0.02 <0.1 <1
x Phosphate ppm 0.04
Phosphorus,Total ppm
<o.t
x Potassium ppm 12 10.8 12.5 12.5 13
Sderium Ppm <0.01 <0.005 <0.005 <0.05
SiIca ppm 25.8
x Sila Dioxide pan 54.3 54.8 50.5 48.7
SINer ppm <0.05 <0.002 <0.002 <0.1
P Soden ppm 64.8 69.93 70 56 54
x Strwilun ppm 1 0.935 0.96 0.935 0.935
x Sulfate ppm <10 <5.0 <1 1 2 7?
Sulfate Turbidmatric ppm as SO4 5 5
Sulfide ppm as H25S 0.14 0.18
Thallium pan .. <0.001 <0.002
Zinc ppm 0.026 <0.005 0.13 .5.0
Acidity,Total ppm as CaCO3
54 16 34
Nalrity.Bicarbonate ppm as CaCO3 303 385 391 392
x Nnlrity,PMnoipNhal ppm as CaCO3 Na Na Na Na Ws
x Nnlrity,Total ppm as CaCO3 388 382 370 391 392 372 407 maxima*
x Bicarbonate ppm
x Carbonate ppm 0 0
o Carbon Dlodde,field ppm 75-80 >100
a Cola Wits 11 15 12 23 22 <5
x Conductivity pan
Co^ducthnty umhos/cm 1440 872 713
x Hardness,Total ppm as CaCO3 . 277 279 242 253 302 70.100
x Hydrogen Sulfide.field ppm 0.3-0.5 0.5-0.7 <0.05
x Odor none
Dissolved Oxygen ppm 0.4-0.6 0.6
x Suspended Sada ppm 2 <1 <0.2 du
x SOI Ngh 1.92
o TOS ppm 517 433 419 477 <500
x TOC ppm 43.4 12.2 16 102 12 10.8 11.4 18.99 20.83 <2
x Turbidly rdu <I 0.57 <1 6.2 14 <0.2 Wiwi dd.
x pH.field wits 7.0
pH,W wits 10.2 7.4 7.3 7.39 7.4 7.4-7.8 7.7 7.3 8.5.7.5
x Temp,geld 62 F/17 C 18 C
HAA-5(FP) ppb 197.5 <30 Proposed Stage 2
TTFM(FP) ppb 127.45 336.7 <40 Proposed Stage 2
BOOS ppm <1 <1
Faa Naea
@: •
x 5pedficay oDOW Methyl Orange Iodates pH (CO3-)
• axx
Crirated to to 1/4 1/4 original
M
volae PnobNlaM8.in Indicates pH•6.3(HCO3-)
Sanplsr discarded sampls preservative P/erwlphtelein A kIty a Total Acidity
Methyl Orange AlmIrdfy•Total A9ahity
Page 1

Analytical and Consulting Chemists
- ' © X F O R D 1316 South Fifth Street
aboratories DATE RECEIVED 04-21-99
Wilmington, N.C. 28401
DATE REPORTED 04-29-99 [phone]
n c. 99W2236 Fax[phone]
PAGE 1 OF 1
IIPC
2301DREXWOODSIS HDR. /SUITETY & E200 P . O. # APR ti 1998
RALEIGH, NC 27607 ARCA)
ATTENTION: TYLER H I GHF I LL C`ra�6ty Miller
SAMPLE DESCRIPTION: WELL 2 4-20-99 BELHAVEN
1 . WELL 2 #1
2 . WELL 2 #2 LAB CONCENTRATED
3 . WELL 2 #2
RESULTS
1 2 3
BODS , as 02 , PPM <1 <1 X
pH (Lab) 7 . 40 10 . 2 7 . 30
Total Organic Carbon , as C , PPM 12 . 2 43 . 4 X
TBRoL)-ooT
Ammonia Nitrogen , as NH3-N, PPM <0 . 20 <1 . 75 10 . 56L--)- /(SAMPLER DUMPED
pRZsERv,TIVE7 )
K N MITH, SENIOR ANALYST

PHONE CALL SUMMARY
18 MAY 99
RE: NPDES Ammonia Sampling
Water System Improvements
Town of Belhaven, NC
Arcadis Project No. NC039341.0040
TYLER HIGHFILL spoke with MILBERT, Town maintenance
Phone: [phone]
TWH called to inquire about the sampling procedure used to collect the 4/20/99 samples. Milbert
said he torched the sample spigot and let it flush about 5 minutes. He collected the samples one
right after the other. None of them overfilled, but Milbert told me that he dumped out the liquid
in one of the sample bottles. When he realized all the other bottles had liquid in them he did not
empty them out. He packaged them in the cooler and shipped them off.
Page:
a m139341-401vd_p,nllbert-phone.doc 1/1

- • 1t i.A.4. r fedi.. ,
JUN 0 7 1999 Analytical and Consulting Chemists
© X F O R D1316 South Fifth Street
ARCADIS Geraghty&Miller
Wilmington, N.C. 28401
aboratories DATE RECEIVED 05-27-99 [phone]
t1C. DATE REPORTED 06-03-99
Fax[phone]
99W3052
PAGE 1 OF 1
ARCADIS GERAGHTY & MILLER P . O. It 01313
2301 REXWOODS DR. /SUITE 200
RALEIGH, NC 27607
ATTENTION: TYLER HIGHFILL
SAMPLE DESCRIPTION: 5 AMMONIA TOWN OF BELHAVEN
1 . WELL 2 5-25-99 0840
2 . WELL 2 5-25-99 0910
3 . WELL 2 5-25-99 0940
4 . WELL 2 5-25-99 1010
5 . WELL 2 5-25-99 1040
RESULTS
1 2 3 4 5
Ammonia Nitrogen , as NH3-N, PPM 0 . 11 <0 . 10 <0 . 10 <0 . 10 <0 . 10
6-2
KEN S I1 SE OR ANALYST

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PROJECT NAME: BELHAVEN WTP NPDES PERMITTING BY: T.Hiqhfill
PROJECT NO.: NC039341.0040 DATE: 10-May-99
NORMAL DEPTH PROCEDURE(Trapezoidal Channel):
Channel A:
Input OuOutput:
Manning's n: 0.022 Z(req): 0.2715 Z(av): 0.271119 Z(req)-Z(a 0.0003
Side Slope: 1 :1 Wet. Per(P): 2.25 ft
Peak Flow(Q): 0.26 cfs Hyd Radius(R): 0.28 ft
Channel Slope(s): 0.0002 Depth of Flow(Y): 0.79 ft
B.Width(B): 0 ft Flow Area(A) 0.63 sq.ft
Velocity(V): 0.41 fps
Page 1

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To: Permits and Engineering Unit SOC Priority Project: Yes No _x_
Water Quality Section If "Yes", SOC No.
Attn: Steven Pellei
Date: 02/19/99
NPDES STAFF REPORT AND RECOMMENDATION to
Town of Belhaven -n
rn
Nanofiltration Water Treatment Plant Reject Discharge 00
Permit No. NC0086584
PART I - GENERAL INFORMATION .b n r-
1. Facility and Address: Town of Belhaven, Mr. Tim M. Johnson, Toraa.
Manager,301 East Main Street, Belhaven, NC 27810
N =
2. Date of Investigation:
3. Report Prepared by: Al Hodge
4. Contact Person and Telephone Number(s) : Tim Johnson 252-493-3055
5. Directions to Site: Beginning at the intersection US 264 & NC 92,
proceed east along US 264 for approximately 4,000 feet to a gravel farm
path on the west side of the road, the proposed water treatment plant is
to be located approximately 2,000 feet down the path
E 32 sE
6. Discharge Point(s) ; List for all discharge points:
Latitude: Longitude:
Attach USGS map extract and indicate treatment facility site and
discharge point on map.
USGS Quad Name: Pantego
7. Site size and expansion area consistent with application? Yes No
If "No", explain: No construction has been performed site size can not
be determined without survey markers and they have not been installed at
this stage
8. Topography (relationship to flood plain included) : 5 foot MSL
9. Location of nearest dwelling: 2,000 ft.
10. Receiving stream or affected surface waters: UT to Pantego Creek
a. Classification: SC-NSW
b. River Basin and Sub-basin No. : 03-03-07
c. Describe receiving stream features and pertinent downstream uses:
Proposed discharge is to a zero flow stream which leads to Pantego
Creek. Pantego Creek is use for full body contact, fishing,
boating, drainage, and fish propagation

PART II - DESCRIPTION OF DISCHARGE AND TREATMENT WORKS
1. a. Volume of Wastewater to be Permitted: 220,000 gpd
b. Current Permitted Capacity: New Project
c. Description of proposed wastewater treatment facilities: No
treatment proposed
d. Possible toxic impacts to surface waters: Fluoride WQ standard 1.8
mg/1 with projected concentrations as high as 2.1 mg/1 has been
shown to have toxic affects at other Nanofiltration filtration
reject discharges
2. Residuals Handling and Utilization Disposal Scheme: No residual program
proposed
3. Treatment Plant Classification (attach completed rating sheet) : No
treatment system proposed
4. SIC Code(s) :
Wastewater Code(s) :
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) ?Funding source is not part
of the submitted information. Given the nature of the project I do not
believe Construction Grants & Loans has funded any portion of the
project
2. Special monitoring or limitations (including toxicity) requests:
Toxicity testing is recommended with the present point of discharge(zero
flow stream) . Fluorides, TOC, Ammonia as NH4, BOD5, chloride, iron,
turbidy
3. Alternatives Analysis Evaluation: Has the facility evaluated all of the
non-discharge options available? Provide Regional perspective for each
option evaluated. I have not seen an AAE. However, an AAE will not find
a less expensive alternative to discharge. Agricultural fields surround
the proposed treatment plant and I believe it appropriate to explore the
possibility of using this water for irrigation when possible.

•
PART IV - EVALUATION AND RECOiDATIONS: I am requesting additional
information by which to evaluate this application.
1) I have concerns regarding a BOD from this discharge. It has come to
my attention that the source water is high in Total Organic Carbon(TOC) .
The concentrations are potentially high with the reject water being
concentrated four times the source water. I requesting the applicant
address this through testing.
2) I also have concerns with an oxygen uptake exerted from the NH4 in
the discharge. The oxidation occurs at a ratio of 1.502 to NH4. The
oxidation process requires the autotrophic organism Nitrosomonas that
occurs naturally.
3) It appears the Roper Ditch; the drainage structures name at Pantego
Creek is partially plugged at the mouth. I have concluded this because
of the water level in the ditch year round.
al Alt
Signature o -.ort preparer
Wat(r ualit"Tgional Supervisor
9-(1-2-441
Date
NPDES Permit Staff Report
Belhwtpl
2-19-99
02 yclA�

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ENGINEERING ALTERNATIVES ANALYSIS FOR THE
REJECT STREAM FROM A MEMBRANE WTP
TOWN OF BELHAVEN,NC
ARCADIS PROJECT NO.NC039341.0040
February 18, 1999
The following is a discussion of alternatives reviewed for disposal of the membrane water treatment plant
reject stream. The projected maximum monthly reject flow rate based on the water plant operating at 70%
recovery is 216,000 gpd.
Disposal to POTW:
The local wastewater treatment plant(WWTP) is owned by the Town of Belhaven. The current expansion
to a permitted capacity of 1 MGD is expected to be completed prior to start-up of the water treatment plant
(WTP). Directing the reject stream to the WWTP would consume 22%of it's new capacity. The WTP
reject stream will not have BOD or ammonia loading or fecal content;therefore,directing the stream to the
WWTP will take-up hydraulic capacity without adding food to the treatment system. The WTP reject
volume was not included as anticipated flow to the WWTP so it would need to be expanded again if this
were the Town's only option.
A copy of the letter from the Town Manager stating the unacceptability of directing this flow to the WWTP
is attached.
Disposal to Privately Owned Treatment Works:
There are no privately owned treatment works in the vicinity capable of handling this volume of reject water.
Subsurface Systems:
The high water table and peat soils make subsurface disposal of this quantity of water impossible.
Land Application:
The entire Town limits are within the 100-year flood plain. The fields surrounding the proposed WTP are
approximately 6' above mean sea level. The Belhaven 201 Facilities Plan Update by Cavanaugh&
Associates,P.A.evaluated land application of the WWTP effluent as an alternate to expanding their
permitted discharge capacity. The plan update concluded that the typical depth to groundwater is 1 to 3 feet
below grade which does not suit either rapid or slow rate infiltration methods.
Since the soils near the WTP site are similar to that reviewed for the WWTP, land application of the WTP
reject was evaluated to be an unacceptable disposal alternative and was eliminated from consideration for
this project.

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Indult Clerk CNuUua u4
�IlarieS�amg, /L February 22, 1999 Names .Iabgeg
N. (411
Mr.Charles Weaver
NCDENR
Post Office Box 29535
Raleigh, North Carolina 27626-0535
Re: NPDES Permit Application No.NC0086584
WTP Project Disposal to POTW
Town of Belhaven,Beaufort County
Dear Mr. Goodrich:
We have reviewed the possibility of directing the reject water steam produced by the new
membrane water treatment plant(WTP)to our wastewater treatment plant(WW1P). The
estimated reject flow of 216,000 gpd would consume approximately 22%of our permitted
wastewater treatment plant capacity following the expansion currently underway.
The Updated 201 Facilities plan for the WWTP allotted a future flow of 46,000 gallons per day
for residential, commercial, and industrial growth. Directing the WTP reject stream to the
WWTP would consume all of this reserve capacity prohibiting future growth. There are no
service lines in the area for sewer even if we had the capacity.
If we were to direct this flow to our WWTP we would be forced to expand our plant again which
would impose an unnecessary additional financial burden on our rate-payers. Since there is an
alternative feasible method to handle the reject water steam by direct discharge,we believe that
it is unacceptable to accept the reject stream at the WWTP facility.
Sincerely,
im M.Johnson
Towjanager
xc: Tyler Highfill,Arcadis Geraghty &Miller
Ed Warren, Washington Regiai0? l 999
edekteiraft9
CLefe,t
Va8t office Pox 220, jelbaben,l/artlj Carolina 27810 • [phone] • fax[phone]

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Project Narrative November 12,1998
NPDES Permit Application
Nanofiltration Water Treatment Plant
Town of Belhaven,Beaufort County
Description of Plant Discharge Flow Rates
The Town's source of water will be from three groundwater wells. Upon each plant start-up,the
well(s)to be used will be blown-off to the point discharge pipe for a period of approximately 5-15
minutes at a projected rate of up to 500 gpm to clear the turbidity generally suspended during well
start-up. Once the turbidity drops to an acceptable level,the raw water will be directed to the
nanofiltration membrane treatment process,and a constant flow of reject water at a rate up to 150 gpm
will be produced and released to the point of discharge. The remaining 350 gpm will become potable
water.
Projection of Permeate Concentrations
The concentration of various reject(waste water)components depends on many variables and
assumptions made during design and plant construction. These factors and a discussion of their
importance are listed below:
Variable Discussion
Raw water quality Raw water quality has been established from the existing wells and
from a test well that has been installed and monitored. These wells
will give results on the current water available. The water is not
expected to vary appreciably,since the existing wells indicate the
performance of the aquifer over time,but the results may vary
slightly. A 10%water quality degradation has been assumed for the
purpose of this evaluation,and is added at the end of the calculation
as an increase in concentration(see Table I).
Recovery Recovery is the percentage of permeate(treated)water produced. It
is calculated by dividing the quantity ofpermeate water produced by
the quantity of raw water fed -
The percentage of recovery selected will affect the concentration of
the constituents in the reject stream by virtue of having a variable
amount of water in which the ions are dissolved. The point at which
an ionic combination reaches saturation in the concentrate and
begins to precipitate on the membrane usually determines the rate of
recovery.
In this case the limiting compound appears to be Silica Dioxide
(SiO2)which will limit the recovery to about 75%. Calculations
have also been run at 75%plus or minus 5%recovery to determine
Nanofiltration Water Treatment Plant
Town of Belhaven,Beaufort County
ARCADIS Geraghty&Miller Project No.NC039341.0040.00001
November 12,1998

worst case scenarios for reject flow rate and reject constituents.
pH adjustment The adjustment of raw water pH may affect the concentrate makeup
in two ways. The pH will affect the carbon dioxide balance of the
water,thus increasing or decreasing alkalinity. In addition,the
chemical added to adjust the pH will increase the quantity of ions in
the feed water and reject water.
A decision has been made to use sulfuric acid as a means of pH
adjustment of the raw water to prevent bicarbonate fouling of the
membranes. A feed rate of 37 mg/L is assumed to reduce the pH to
7.0 in the feed water.
Anti-foulant Agents Often the performance of a membrane system can be enhanced by
adding chemicals to the raw water to prevent scaling and
precipitation of particles in the membrane element. These chemicals
must be NSF approved and are usually proprietary in nature.The
calculations assume that none of these chemicals are added. Since
these chemicals are added in small concentrations,the resulting
reject concentrate is not expected to be significantly affected.
Membrane Selection Membrane characteristics are dependent on the membrane
manufacturer. The membranes will be of the nanofiltration type. Of
particular importance is the rejection rate of each ion by the
membrane. Since the membrane works by repulsion of electrostatic
charges,the valance of the ion is important in determining the rate of
rejection of the ion(i.e.monovalent ions are rejected to a lesser
extent than divalent ions).
Given that the membranes will not actually be determined until after
the bidding process,a range of rejection values must be used to
estimate reject concentrations.It has been assumed that monovalent
ions are rejected at a rate of 55%to 75%and divalent ions at a rate
of 75%to 90%. Trivalent ions are assumed to be removed at 95%to
99%. These values are based on preliminary computer model runs
Membrane Train Different configurations of membrane elements within the
Configuration membrane train will make some difference in the rejection of
specific ions.
The differences between membrane configurations are considered
negligible within the range of concentrate projections for this project.
A two-stage train is be assumed with six elements per vessel.
Concentrate Post Post-treatment of the concentrate is not provided;therefore,the
Treatment projections are based on reject discharged directly from the
membrane train.
Nanofiltration Water Treatment Plant
Town of Belhaven,Bcaufort County
ARCADIS Geraghty&Miller Project No.NC039341.0040.00001
November 12,1998

Projections of concentrate water TABLE 1 -
Variables(see narrative)
-Membrane Used It has been assumed that monovalent ions are rejected at a rate of 55%to 75%and divalent ions at a rate of 75%to 90% These values are based
-Recovery on preliminary computer model runs.
-Source Water Concentrations
In this case the limiting compound appears to be Silica Dioxide(S102)which will limit the recovery to about 75% Concentration calculations have
Salt Passage: been run at 80%recovery to determine a worst case scenario for concentrate if it is seen that the recovery can be safely attained.
Monovalent 55% 75%
Divalent 75% 90% A 10%water quality degradation has been assumed for the purpose of this evaluation,and is added at the end of the calculation as an increase in
Trivalent 90% 100% concentration.
Quadevalent 100% 100%
Ionic Constituents:
Max.Reject
Reject Reject Concentration
Absolute Membrane Membrane Concentration @ Concentration @ with 10%Raw
Source Water Charge Rejection Rejection 80%Recovery 80%Recovery Water
Component Concentration Min Max (Note 1) Comments (Minlmim) (maximum) (Minimum)_ (Maximim) Degradation
Aluminum ppm 0 1 0.1 0 1 _ 3 90% 100% 0 450 0.500 0 550
Ammonia ppm as NH4 0.8 0.8 0.8 1 55% 75% 2.200 3 000 3.300
Antimony ppm <0.003 0 0 003 1 As antimonite Sb(OH)4 55% 75% 0.000 0.011 0 012
Arsenic ppm <0.01 0 0 01 3 As Arsonate(AsO4) 90% 100% 0 000 0 050 0 055
Barium ppm 0.17 0.17 0 17 2 75% 90% 0.638 0 765 0 842
Beryllium ppm <0.002 0 0 002 2 75% 90% 0.000 0.009 0 010
Bromide ppm <0 5 0 0 5 1 55% 75% 0.000 1 875 2 063
Cadmium ppm <0.001 0 0.001 2 75% 90% 0.000 0 005 0 005
Calcium ppm 70-88 70 80 2 75% 90% 263 360 396
Chloride ppm 12-17 12 17 1 55% 75% 33 0 63 8 70.1
Chromium _,ppm <0 005 0 0 005 3 90% 100% 0 000 0 025 0 028
Copper ppm <0.01 0 0 01 2 75% 90% 0.000 0 045 0 050
Cyanide ppm <0.005 0 0 015 1 55% 75% 0.000 0.056 0 062
Fluoride ppm 0 30-0 52 0 3 0 52 1 55% 75% 0.825 1.950 2 145
Iron ppm 0.12 0 12 0 12 2 Reduced 75% 90% 0.450 0 540 0 594
Lead ppm <0.005 0 0 005 2 75% 90% 0.00 0.023 0 025 ,
Magnesium ppm 17.4-18 7 17.4 18 7 2 75% 90% 65 3 84.2 92.6
Manganese ppm <0 01 0 0.01 2 75% 90% 0.00 0.045 0 050
Mercury ppm <0.0002 0 0 0002 1 55% 75% 0.00 0.001 0.001
Nickel ppm <0.010 0 0 01 1 55% 75% 0.00 0.038 0 041
Nitrate ppm <0 1 0 0 01 2 75% 90% 0 00 0.045 0 050
Nitrite ppm <0 02 0 0 02 1 55% 75% 0.00 0 075 0.083
Phosphorus ppm <0.1 0 0.1 3 As PO4 90% 100% 0.00 0.500 0.550 •
Potassium ppm 10 8-13 0 10 8 13 1 55% 75% 29 7 48.8 53.6
Selenium ppm <0 01 0 0 01 2 75% 90% 0 00 0 045 0 050--
Silica Dioxide ppm 48.7-54 3 48.7 54.3 4 As Silicate(SiO4) 100% 100% 244 272 299
Silver ppm <0 05 0 0 05 1 55% 75% 0.00 0.188 0.206 --,
Sodium ppm 54-70 54 70 1 55% 75% 149 263 289
Strontium ppm 0 94 0 94 0 94 2 75% 90% 3 53 4 23 4 65
Sulfate ppm <5 0 0 5 2 75% 90% 0.00 22.5 24 8
Thallium ppm <0.001 0 0 001 1 55% 75% 0 00 0 004 0 004
Zinc ppm 0 026 0 026 0 026 2 75% 90% 0.098 0.117 0 129
pH Projections:
Raw Water=7 3-7.4
Reject Water=5.8-8.0
Note 1: The charge is based on the commonly disolved ionic form,which may be a complex ion.

•
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NC039341.0040 W202

02/18/99 15:54 FAX [phone] ARCADIS Geraghty Miller Z001/001
ARCAD1SGERAGHTY& MILLER -�
ARCADIS Geraghty 8 Miller.Inc.
2301 Rexwoods Drive
Suite 200
TELEFAX Raleigh
North Carolina 27607-3366
Tel gig 7825511
To: Copier. Fax [phone]
Al Hodge Steve Pellei @ 733-0719
DWQ Washington
WATER AND WASTE
MANAGEMENT
Fax; Date:
252-975-3716 18 February 1999
rrom: Total pages:
Tyler W.Highfill 1
Extension; Ou•ref.:
138 NC039341.0040
Subject;
Belhaven NPDES Application No.NC0086584
Fr LC
If you do riot receive all pages.please call to let ue know as soon as possible.
Following our conversation earlier today on the Belhaven Membrane Reject;
Total Organic Carbon concentration projection(consistent calculations with that shown in Table 1
attached to permit application)
Max. Reject Cone_
Source Membrane Reject w/10% Source
Concentration Rejection Concentration Degradation
10-16 ppm 90-100% 50-80 ppm 88 ppm
THIS MESSAGE Is INTENDED ONLY FOR THE USE Of THE tNDIVIDUAL OR ENTITY TO WHICH IT 15 ADDRESSED AND MAY CONTAIN
INFORMATION THAT 15 PRIVILEGED,CONFIDENTIAL,AND EXEMPT FROM DISCLOSURE UNDER APPLICABLE LAW.
It the reader of this message Is not the Intended recipient,or the employee or agent responsible for delivering the meaaage to the
intended recipient,you are hereby notified that any dissemination,distribution,or copying of this communication is strictly
prohibited.If you have received this communication in error,please notify us immediately by telephone and return the original
mossago to us at the above address via the U.S.postal service.

I1ounof 41,
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Tim 161.3foijnoon filbert Baker
�Obin c�lerlt �Lpntljia 01. *rad)
Marie 3. barn , CAC 22, 1999 3fameg Ai.jDobgeg
Mr. Charles Weaver ;`
NCDENR -n
rn
Post Office Box 29535 CO
Raleigh,North Carolina 27626-0535
Re: NPDES Permit Application No. NC0086584 `_
WTP Project Disposal to POTW •
Town of Belhaven, Beaufort County
c„._-,
Dear Mr. Goodrich:
We have reviewed the possibility of directing the reject water steam produced by the new
membrane water treatment plant (WTP) to our wastewater treatment plant(WWTP). The
estimated reject flow of 216,000 gpd would consume approximately 22% of our permitted
wastewater treatment plant capacity following the expansion currently underway.
The Updated 201 Facilities plan for the WWTP allotted a future flow of 46,000 gallons per day
for residential, commercial, and industrial growth. Directing the WTP reject stream to the
WWTP would consume all of this reserve capacity prohibiting future growth. There are no
service lines in the area for sewer even if we had the capacity.
If we were to direct this flow to our WWTP we would be forced to expand our plant again which
would impose an unnecessary additional financial burden on our rate-payers. Since there is an
alternative feasible method to handle the reject water steam by direct discharge, we believe that
it is unacceptable to accept the reject stream at the WWTP facility.
Sincerely,
L_,.......,/ 74*. 19 0 —
im M. aeon
Tow. k anager
xc: Tyler Highfill, Arcadis Geraghty & Miller
Ed Warren, Washington Regi 800 _ l 999
eetektaugOOe
tort Office fox 220, ell)aben,, ortlj Carolina 27810 • [phone] • fax [phone]

ARCADIS GERAGHTY& MILLER
ARCADIS Geraghty&Miller,Inc.
2301 Rexwoods Drive
Suite 200
Mr. Charles Weaver Raleigh
NPDES Unit North Carolina 27607-3366
North Carolina Department of Environment and Tel [phone]
Natural Resources Fax [phone]
Post Office Box 29535
Raleigh,North Carolina 27626-0535
WATER AND WASTE
MANAGEMENT
Subject:
NPDES Permit Number NC0086584
Town of Belhaven, Beaufort County
ARCADIS Geraghty&Miller Project Number NC039341.0040
Dear Mr. Weaver:
Raleigh,NC,
19 February 1999
In response to Steve Pellei's letter dated February 4, 1999, requesting additional
documentation on the subject project, please find enclosed our review of alternate Contact:
disposal options including a USGS map with discharge location marked and a letter Tyler Highfill
statement from the local wastewater treatment plant official.
Please let us know if you need additional information.
Extension:
Sincerely, 138
ARCADIS Geraghty &Miller Inc.
X4'7/
er W. Highfi �!
/ps
Enclosures '•
'1
Copies: N
Copies:
Tim Johnson
John Maynard
Our ref.:
NC039341.0040/sp-let.doc.doc

f
. .
State of North Carolina
Department of Environment •
and Natural Resources Alf
Division of Water Quality
James B. Hunt, Jr., Governor NCDENR
Wayne McDevitt, Secretary
A. Preston Howard, Jr., P.E., Director NORTH CAROLINA DEPARTMENT OF
ENVIRONMENT AND NATURAL RESOURCES
February 4, 199,2(1
Mr. Tim M. Johnson
Town Manager
Town of Belhaven
301 East Main Street
Belhaven,North Carolina 27810
Subject: NPDES Permit Application
Permit No. NC0086584
Town of Belhaven
Beauford County
Dear Mr. Johnson:
The Division acknowledges receipt of your NPDES permit application and a check for $400.00 (#004823).
The permit number highlighted above has been assigned to the subject facility. A review of the submitted
material indicates additional information is needed.
Please submit documentation addressing the following items:
A USGS map with the location marked. The application contained a map with the location of the proposed
WTP, however the location of the proposed discharge was not marked. Please indicate the point of
discharge on a USGS map.
Statement from the local WWTP. Please include a statement regarding the acceptability of this wastewater
at the local wastewater treatment plant.
As the Division proceeds with a more detailed review of the application, additional information may be
required. At this time, by copy of this letter, the Division is requesting that our Washington Regional
Office Water Quality Supervisor prepare a Staff Report containing recommendations regarding this
discharge. The Division will forward any additional information to the Region upon receipt.
This application has been assigned to me for review. If you have any questions regarding this permit, or if
I can be of any further assistance, please do not hesitate to contact me at [phone], extension 516.
Please submit the additional information by February 26, 1999. If the required information is not received
by this date, the Division will have no alternative but to return this application as incomplete.
Sincerely,
STY4/0- t -t/i/M
Steven Pellei
cc: Washington Regional Office/Water Quality Section(with attachment)
NPDES Unit/Steve Pellei
Central Files
Tyler Highfill, ARCADIS
2301 Rexwoods Dr., Suite 200
Raleigh,NC 27607
P.O. Box 29535, Raleigh, North Carolina 27626-0535 Telephone[phone] FAX [phone]

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ARCADIS GERAGHTY& MILLER itiU
ARCADIS Geraghty&Miller,Inc.
2301 Rexwoods Drive
Suite 200
Mr. Dave Goodrich Raleigh
North Carolina Department of Environment North Carolina 27607-3366
and Natural Resources Tel [phone]
Post Office Box 29535 Fax [phone]
Raleigh,North Carolina 27626-0535
WATER AND WASTE
MANAGEMENT
Subject:
NPDES Permit Application
Nanofiltration Water Treatment Plant Reject Discharge
Town of Belhaven, Beaufort County
ARCADIS Geraghty&Miller Project Number 39341.0040
Raleigh,NC,
12 November 1998
Dear Mr. Goodrich:
Contact:
On behalf of the Town of Belhaven we are sending you herewith three copies of the Tyler Highfill
Short Form C,project narrative, scaled site plan, and USGS map for the subject
project.
The new water treatment plant will have an estimated reject discharge of 300,000 gpd. Extension:
A detailed description of the projected waste characteristics and the treatment process 138
are included in the attached project narrative.
We will be pleased to meet with you to discuss this application in person if you would
like;otherwise, call us if you have any questions.
Sincerely,
ARCADIS Gerag•ty ,iller, Inc.
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Enclosures -.1
Copies:
J. Maynard
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Our ref.:
N CO3 9341.0040/d g-I et.doc

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