NC0020648_Permit (Issuance)_20050214

NPDES DOCUMENT SCANNING COVER :MEET
NPDES Permit:
NC0020648
Washington WWTP
Document Type: ,,Permit
Issuance
Wasteload Allocation
Authorization to Construct (AtC)
Permit Modification
Complete File - Historical
Engineering Alternatives (EAA)
Correspondence
Owner Name Change
Staff Report
Instream Assessment (67b)
Speculative Limits
Environmental Assessment (EA)
Document Date:
February 14, 2005
This document its priated on reuse paper - ignore any
content on the reYerse side

A T x;,
Q
Michael F. Easley
Governor
rWilliam G. Ross, Jr., Secretary
North Carolina Department of Environment and Natural Resources
Alan W. Klimek, P.E., Director
Division of Water Quality
February 14, 2005
Mr. Stephen Adam Waters II, Water Resources Superintendent
City of Washington
P.O. Box 1988
Washington, North Carolina 27889
Subject: Issuance of NPDES Permit
NC0020648
City of Washington Regional WWTP
Beaufort County
Dear Mr. Waters:
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 modifications from the draft permit are included in the final permit:
• Section A. (4.) in the draft permit contained the chronic toxicity language instead
of the acute toxicity language. The correct language was included in the permit.
• The description of the treatment system was corrected to read "four clarifiers"
instead of "five clarifiers".
• The total residual chlorine limit was corrected to read 28 µg/ L instead of 28 g/L.
If any parts, measurement frequencies or sampling requirements contained in this permit
are unacceptable to you, you have the right to an adjudicatory hearing upon written request
within thirty (30) days following receipt of this letter. This request must be in the form of a
written petition, conforming to Chapter 150B of the North Carolina General Statutes, and
filed with the Office of Administrative Hearings (6714 Mail Service Center, Raleigh, North
Carolina 27699-6714). Unless such demand is made, this 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 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.
Carolina
Furallij
North Carolina Division of Water Quality 1617 Mail Service Center Raleigh, NC 27699-1617
Internet h2o.enr.state.nc.us 512 N. Salisbury St.
Phone [phone]
Raleigh, NC 27604 FAX [phone]
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Permit No. NC0020648
City of Washington Regional WWTP
Page 2
If you have any questions concerning this permit, please contact Teresa Rodriguez at
telephone number [phone], extension 553.
Sincerely,
ORIGINAL SIGNED BY
Tom Belnick
Alan W. Klimek, P.E.
Cc: NPDES Files
Central Files
US EPA Region 4
Washington Regional Office
Aquatic Toxicology Unit

Permit No. NC0020648
STATE OF NORTH CAROLINA
DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES
DIVISION OF WATER QUALITY
PERMIT
TO DISCHARGE WASTEWATER UNDER THE
NATIONAL POLLUTANT DISCHARGE ELIMINATION SYSTEM
In compliance with the provisions of North Carolina General Statute 143-215.1, other lawful
standards and regulations promulgated and adopted by the North Carolina Environmental
Management Commission, and the Federal Water Pollution Control Act, as amended, the
City of Washington
is hereby authorized to discharge wastewater from a facility located at the
City of Washington WWTP
1399 West tad Street
Washington
Beaufort County
to receiving waters designated as the Tar River in the Tar -Pamlico 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 April 1, 2005.
This permit and authorization to discharge shall expire at midnight on November 30, 2009.
Signed this day February 14, 2005.
)HGINAL SIGNED BY
Tom B:elnict,
Alan W. Klimek, P.E., Director
Division of Water Quality
By Authority of the Environmental Management Commission
Page 1

Permit No. NC0020648
SUPPLEMENT TO PERMIT COVER SHEET
All previous NPDES Permits issued to this facility, whether for operation or discharge are hereby
revoked. As of this permit issuance, any previously issued permit bearing this number is no longer
effective. Therefore, the exclusive authority to operate and discharge from this facility arises under
the permit conditions, requirements, terms, and provisions included herein.
City of Washington
is hereby authorized to:
1. Continue to operate an existing 3.65 MGD wastewater treatment facility located off
Second Street, Washington, Beaufort County, and consisting of:
• Influent metering vault
• Mechanical bar screen
• Automatic aerated grit chamber
• Splitter box
• Aeration basin
• Activated sludge oxidation ditch
• Four secondary clarifiers with scum removal and pumped sludge return
• Five cell deep -bed denitrification sand filters with a methanol storage/feed
system
• Dual chlorine contact chambers with flow paced gaseous chlorine feed
• Sulfur dioxide dechlorination
• Reaeration Basin
• Lime storage tower
• Caustic soda and polymer feed system
• Sludge mixing tank with lime addition
• Four sludge thickening lagoons
• Recirculation pump and decant draw off
• 60,000 gallon mud well
• Sludge recirculation pump station
• Effluent pump station
• Effluent diffuser
2. Discharge from said treatment works, through outfall 001, into the Tar River, a Class C-
NSW water in the T'r-Pamlico cRifer Basin, at the location specified on the attached
Pmap.
•
Page 2

City of Washington
State Grid/Ouad: E3OSE / Washington Latitude: 35° 3554" N
__Loneitude: 04L2] W
Receiving Stream: Tar River Drainage Basin: Tar -Pamlico River
Stream Class: C-NSW Sub -Basin: 03-03-07
c",•••••;;,.
Facility Location
not to scale
North
NPDES Permit No. NC0020648
Beaufrort County

5-4-
Permit No. NC0020648
A. (1.) EFFLUENT LIMITATIONS AND MONITORING REQUIREMENTS
Beginning on the effective date of this permit and lasting permit expiration, the Permittee is authorized to
discharge treated wastewater from Outfall 001. Such discharges shall be limited and monitored by the
Permittee as specified below:
EFFLUENT tOOTATIONS
MONITORING REQU 7RE N
onthly
.. e
\ee7y
)
, y
<.M xtiun
M sut ent
Frequency
S p1e TY e
Ye
o
Flow (MGD)
3.65
Continuous
Recording
I or E
BOD5 2
13.1 mg/L
19.6 mg/L
Daily
Composite
I, E
Total Suspended Solids2
30.0 mg/L
45.0 mg/L
Daily
Composite
I, E
NH3 as N
3.5 mg/L
10.5 mg/L
Daily
Composite
E
Dissolved Oxygen
Daily average not less than 5.0 mg/L
Daily
Grab
E
Fecal Coliform
200/100 ml
400/100 ml '-
Daily
Grab
E
Total Residual Chlorine3
28.0 µg/L
Daily
Grab
E
Temperature
Daily
Grab
E
pH
Between 6.0 and 9.0 Standard Units
Daily
Grab
E
Conductivity
Daily
Grab
E
TN (mg/L)4
Monthly
Composite
E
Total Phosphorus
Monthly
Composite
E
Total Copper
Monthly
Composite
E
Total Zinc
Monthly
Composite
E
Acute Toxicity5
Quarterly
Composite
E
Footnotes:
1. I: Influent. E: Effluent. See condition A. (2) of this permit for instream monitoring requirements.
2. The monthly average BOD5 and Total Suspended Solids concentrations shall not exceed 15% of the respective
influent value (85% removal).
3. Effluent monitoring and limitation only apply if chlorine or a chlorine derivative is added to the waste stream
during treatment.
4. For a given wastewater sample, TN = TKN + NO3-N + NO2-N, where TN is total nitrogen, TKN is total
Kjeldahl Nitrogen, and NO3-N and NO2-N are nitrate and nitrite nitrogen, respectively.
5. Acute Toxicity (Pimephales promelas) @ 90%, February, May, August and November, see special condition A.
(4.) of this permit.
THERE SHALL BE NO DISCHARGE OF FLOATING SOLIDS OR VISIBLE FOAM IN OTHER THAN TRACE
AMOUNTS.
Page 4

Permit No. NC0020648
A. (2.) INSTREAM MONITORING REQUIREMENTS
Instream monitoring is required for the following parameters at the locations specified:
EFFLUENT
CHARACTERISTICS
Measurement Frequency
Sample Type
Sample
P
Location 1
Fecal Coliform
June -Sept
3/week
Grab
U, D
October -May
1/week
Dissolved Oxygen
June -Sept
3/week
Grab
U D
October -May
1/week
Temperature
June -Sept
3/week
Grab
U, D
October -May
1/week
Conductivity
June -Sept
3/week
Grab
U, D
October -May
1 /week
Footnotes:
1. U - Upstream at Grimesland Bridge, D- Downstream at NC Highway 17.
Upon initiation of stream sampling by the Tar -Pamlico Basin Association, the instream monitoring
requirements as stated above are waived. Should your membership in the Association be terminated, you
shall notify the Division immediately and the instream monitoring requirements specified in your permit
shall be reinstated.
A. (3.) NUTRIENT SPECIAL CONDITION
Nutrient limits have not been included at this time because the facility is participating in the non -point
source trading option outlined in the Tar -Pamlico NSW Implementation Strategy Phase II; which was
adopted December 8, 1994 or subsequent approved revisions of the strategy. If compliance with any
element of this strategy or approved revision is not maintained, the Division reserves the right to reopen
this permit to include nutrient limits. If requirements other than those listed in this permit are adopted as
part of a revision of the strategy, the Division reserves the right to reopen this permit to include these
requirements.
A. (4.) ACUTE TOXICITY PASS/FAIL PERMIT LIMIT (QRTRLY)
The permittee shall conduct acute toxicity tests on a quarterly basis using protocols defined in the North
Carolina Procedure Document entitled "Pass/Fail Methodology For Determining Acute Toxicity In A
Single Effluent Concentration" (Revised July, 1992 or subsequent versions). The monitoring shall be
performed as a Fathead Minnow (Pimephales promelas) 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 February, May,
August and November.
Page 5

Permit No. NC0020648
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
TGE6C. Additionally, DWQ Form AT-2 (original) is to be sent to the following address:
Attention: North Carolina Division of Water Quality
Environmental Sciences Section
1621 Mail Service Center
Raleigh, North Carolina 27699-1621
Completed Aquatic Toxicity Test Forms shall be filed with the Environmental Sciences Section no later
than 30 days after the end of the reporting period for which the report is made.
Test data shall be complete and accurate and include all supporting chemical/physical measurements
performed in association with the toxicity tests, as well as all dose/response data. Total residual chlorine of
the effluent toxicity sample must be measured and reported if chlorine is employed for disinfection of the
waste stream.
Should there be no discharge of flow from the facility during a month in which toxicity monitoring is
required, the permittee will complete the information located at the top of the aquatic toxicity (AT) test
form indicating the facility name, permit number, pipe number, county, and the month/year of the report
with the notation of "No Flow" in the comment area of the form. The report shall be submitted to the
Environmental Sciences Branch at the address cited above.
Should any single quarterly monitoring indicate a failure to meet specified limits, 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 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.
Page 6

Permit No. NC0020648
A. (5.) EFFLUENT POLLUTANT SCAN
The permittee shall perform an annual Effluent Pollutant Scan for all parameters listed in the table below
(in accordance with 40 CFR Part 136). The annual effluent pollutant scan samples shall represent seasonal
(summer, winter, fall, spring) variations over the 5-year permit cycle. Unless otherwise indicated, metals
shall be analyzed as "total recoverable." Additionally, the method detection level and the minimum level
shall be the most sensitive as provided by the appropriate analytical procedure.
Ammonia (as N) Trans-1,2-dichloroethylene Bis (2-chloroethyl) ether
Chlorine (total residual, TRC) 1,1-dichloroethylene Bis (2-chloroisopropyl) ether
Dissolved oxygen 1,2-dichloropropane Bis (2-ethylhexyl) phthalate
Nitrate/Nitrite 1,3-dichloropropylene 4-bromophenyl phenyl ether
Total Kjeldahl nitrogen Ethylbenzene Butyl benzyl phthalate
Oil and grease Methyl bromide 2-chloronaphthalene
Total Phosphorus Methyl chloride 4-chlorophenyl phenyl ether
Total dissolved solids Methylene chloride Chrysene
Hardness 1,1,2,2-tetrachloroethane Di-n-butyl phthalate
Antimony Tetrachloroethylene Di-n-octyl phthalate
Arsenic Toluene Dibenzo(a,h)anthracene
Beryllium 1,1,1-tichloroethane 1,2-dichlorobenzene
Cadmium 1,1,2-tichloroethane 1,3-dichlorobenzene
Chromium Trichloroethylene 1,4-dichlorobenzene
Copper Vinyl chloride 3,3-dichlorobenzidine
Lead Acid -extractable compounds: Diethyl phthalate
Mercury P-chloro-m-cresol Dimethyl phthalate
Nickel 2-chlorophenol 2,4-dinitrotoluene
Selenium 2,4-dichlorophenol 2,6-dinitrotoluene
Silver 2,4-dimethylphenol 1,2-diphenylhydrazine
Thallium 4,6-dinitro-o-cresol Fluoranthene
Zinc 2,4-dinitrophenol Fluorene
Cyanide 2-nitrophenol Hexachlorobenzene
Total phenolic compounds 4-nitrophenol Hexachlorobutadiene
Volatile organic compounds: Pentachlorophenol Hexachlorocyclo-pentadiene
Acrolein Phenol Hexachloroethane
Acrylonitrile 2,4,6-trichlorophenol Indeno(1,2,3-cd)pyrene
Benzene Base -neutral compounds: Isophorone
Bromoform Acenaphthene Naphthalene
Carbon tetrachloride Acenaphthylene Nitrobenzene
Chlorobenzene Anthracene N-nitrosodi-n-propylamine
Chlorodibromomethane Benzidine N-nitrosodimethylamine
Chloroethane Benzo(a)anthracene N-nitrosodiphenylamine
2-chloroethylvinyl ether Benzo(a)pyrene Phenanthrene
Chloroform 3,4 benzofluoranthene Pyrene
Dichlorobromomethane Benzo(ghi)peryiene 1,2,4-trichlorobenzene
1,1-dichloroethane Benzo(k)fluoranthene
1,2-dichloroethane Bis (2-chloroethoxy) methane
Test results shall be reported to the Division in DWQ Form- DMR-PPA1 or in a form approved by the Director,
within 90 days of sampling. A copy of the report shall be submitted to Central Files to the following address:
Division of Water Quality, Water Quality Section, 1617 Mail Service Center, Raleigh, North Carolina 27699-1617.
Page 7

City of Washington
P.O. Box 1988, Washington, NC 27889-1988
January 19, 2005
Teresa Rodriguez
NCDENR-Division of Water Quality
NPDES Unit
1617 Mail Service Center
Raleigh NC 27699-1617
TO\
" JAty 2 4 :J
Subject: NPDES Draft Permit No NC0020648- City of Washington WWTP
Dear Ms. Rodriguez,
The City of Washington has the following comments and request concerning the Draft
NPDES Permit (NC0020648) for the City of Washington Wastewater Treatment Plant.
1. Change "five secondary clarifiers" to "four secondary clarifiers" under Supplement
to Permit Cover Sheet.
2. Total Residual Chlorine on Effluent Limitation and Monitoring Requirements page
should read 28 ug/l. Draft permit reads 28 g/1.
3. A (4.) Chronic Toxicity Permit Limit changed to Acute Toxicity Permit Limit as
reflected on the Effluent Limitation and Monitoring Requirements page.
Thank you in advance for your help with the above comments and request to our NPDES
Permit for the City of Washington Wastewater Treatment Plant.
Sincerely,
742,„
Adam Waters
Water Resources Superintendent
cc: Allen Lewis
102 E. Second St. • Telephone [phone] Tr, TDD 1-800-735.2962 • Fax [phone]

UNITED STATES ENVIRONMENTAL PROTECTION AGENCY
REGION 4
ATLANTA FEDERAL CENTER
61 FORSYTH STREET
ATLANTA, GEORGIA 30303-8960
JAN 1 8 2005
Ms. Teresa Rodriguez
North Carolina Department of Environment and
Natural Resources
Division of Water Quality
NPDES Unit
1617 Mail Service Center
Raleigh, NC 27699-1617
3 \N 2 4 2005
L p�::,; :,, r QU ALIIY
11
p0\fl SOURCE 5R t`�
SUBJ: Draft NPDES Permit
City of Washington WWTP - NPDES No. NC0020648
Dear Ms. Rodriguez:
In accordance with the EPA/NCDENR MOA, we have completed review of the draft
permit referenced above and have no comments. We request that we be afforded an additional
review opportunity only if significant changes are made to the draft permit prior to issuance, or if
significant comments objecting to the draft permit are received. Otherwise, please send us one
copy of the final permit when issued.
If you have any questions, please call me at [phone].
Sincerely,
Marshall Hyatt, Environmental Scientist
Permits, Grants, and Technical Assistance Branch
Water Management Division
Internet Address (URL) • http://www.epa.gov
Recycled/Recyclable . Printed with Vegetable Oil Based Inks on Recycled Paper (Minimum 30% Postconsumer)

Draft Pexmit Review
• Subject: Draft Permit Review
From: John Giorgino <[e-mail]>
Date: Wed, 12 Jan 2005 14:29:09 -0500
To: Teresa Rodriguez <[e-mail]>
Hi Teresa,
I have reviewed the Washington Regional WWTP Permit (NC0020648) . Section A(4) has
chronic test language. It should be the acute test language.
Thanks for forwarding the permit to me.
John
ul&
1 of 1 1/13/2005 11:31 AM

Insertions
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jected them to discrimination,
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// at of Agriculture, Washington,
�rtistrator of the Rural Utilities
r0250. Complaints must be filed
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PUBLIC NOTICE
STATE OF NORTH CAROLINA
ENVIRONMENTAL MANAGEMENT COMMISSION/
NPDES UNIT
1617 MAIL SERVICE CENTER
RALEIGH, NC 27699-1617
NOTIFICATION OF INTENT TO ISSUE A NPDES
WASTEWATER PERMIT
On the basis of thorough staff review and application
of NC General Statute 143.21, Public law 92-500 and
other lawful standards and regulations, the North Caro-
lina Environmental Management Commission proposes to
issue a National Pollutant Discharge Elimination System
(NPDES) wastewater discharge permit to the person(s)
listed below effective 45 days from the publish date of
this notice.
Written comments regarding the proposed permit will
be accepted until 30 days after the publish date of this
notice. All comments received prior to that date are con-
sidered in the final determinations regarding the proposed
permit. The Director of the NC Division of Water Quality
may decide to hold a public meeting for the proposed
permit should the Division receive a significant degree of
public interest.
Copies of the draft permit and other supporting infor-
mation on file used to determine conditions present in
the draft permit are available upon request and payment
of the costs of reproduction. Mail comments and/or re-
quests for information to the NC Division of Water Quality
at the above address or call Ms. Carolyn Bryant at (919)
733-5083, extension 520. Please include the NPDES per-
mit number (attached) in any communication. Interested
persons may also visit the Division of Water Quality at
512 N. Salisbury Street, Raleigh, NC 27601-1148 between
the hours of 8:00 a.m. and 5:00 p.m. to review informa-
tion on file.
The City of Washington, NPDES Permit No. NC0020648
has applied for renewal of its permit discharging to the
Tar River in the Tar -Pamlico River Basin, BOD5, ammonia
and total residual chlorine are water quality limited. This
discharge may affect future allocations to this portion of
the receiving stream.
Dowry Creek Community Association, Inc. (PO Box 711,
Belhaven, NC 27810) has applied for renewal of NPEDS
permit NC0068426 for Dowry Creek WWTP in Beaufort
County. This permitted facility discharges 0.05 MGD
treated wastewater to Pungo River in the Tar -Pamlico River
Basin. Currently BOD, ammonia nitrogen, total residual
chlorine, enterococci, total nitrogen and total phospho-
rus are water quality limited. This discharge may affect
future allocations in this portion of the Tar -Pamlico River
Basin.
a-9

DENR/DWQ
FACT SHEET FOR NPDES PERMIT DEVELOPMENT
NPDES No. NC0020648
Facility Information
Applicant/Facility Name:
City of Washington
Applicant Address:
P.O. Box 1988, Washington, NC 27889
Facility Address:
1399 West 21d Street, Washington, NC 27889
Permitted Flow (MGD):
3.65
Type of Waste:
99% Domestic <1% Industrial
Facility Classification:
IV
Permit Status:
Renewal
County:
Beaufort
Miscellaneous
Receiving Stream:
Tar River
Stream index
28-(102.5)
Stream Classification:
C-NSW
Regional Office:
WaRO
303(d) Listed?
Yes
State Grid / USGS Quad:
E3OSE/Washington
TMDL?
Yes
Permit Writer:
Teresa Rodriguez
Basin/Subbasin:
Tar -Pam / 030307
Date:
12/3/04
Drainage Area (mi2):
Tidal
_,
_,,
.. -
-
Lat. 35° 32' 54" N Long. 77° 04' 21" W
Summer 7Q10 (cfs)
Winter 7Q10 (cfs):
30Q2 (cfs)
Average Flow (cfs):
IWC (%):
N/A
Summary: The City of Washington submitted a permit renewal application to the Division on May 19, 2004.
Since the previous permit renewal the facility was upgraded from 3.2 MGD to 3.65 MGD. Currently an
oxidation ditch and a RAS pump station are under construction as part of an improvement project. They have
a permit for reuse of treated effluent (WQ0019179). They reuse up to .00077 MGD of wastewater on athletic
fields on a seasonal oasis. The city participates as a member in the Tar -Pamlico River Basin Association.
Pre -Treatment: The city has an approved pretreatment program with 1 SIU and 1 CIU for a permitted flow of
0.0263 MGD. The permit requires the city to continue to operate its pre-treatment program.
Basin Plan: The Tar River is listed as impared because the chlorophyll -a criterion was exceeded in 17 % of
the samples. A TMDL has been approved by EPA to address nutrient overloading into the river. The Tar River
is also impaired on an evaluated basis in the fish consumption category because fish tissue samples
exceeded the criterion of methylmercury per gram of fish tissue. Mercury is a statewide issue. A new mercury
analytical method for measuring very low concentratIcns of mercury in water was approved by EPA. This
method is being used by wastewater treatment plants to determine levels of mercury from treatment plants.
The division is also conducting a study to gather information thak. will help in the development of a water quality
standard and a TMDL.
DMR Review: For 2003, flow averaged 1.89 MGD, BOD averaged < 2.0 mg/I, Total Suspended Solids
averaged < 1.0 mg/I. The Total Residual Chlorine daily limit was exceedeo once in 2004 and the ammonia limit
was exceeded once in 2004.
Reasonable Potential Analysis: The discharge is to tidal waters, therefore no reasonable potential analysi
was performed for chronic criteria. Acute criteria was compared to the maximum reported values. Values for
zinc and copper exceeded the 1/2 FAV. Monitoring will remain in the permit. The values detected for chromium
and lead were below the acute criteria.
Fact Sheet
NPDES NC0020648
Renewal
Page 1

Effluent Toxicity: The permit requires quarterly acute toxicity testing at 90%. The city passed all the toxicity
tests in the past four years.
Priority Pollutant Scan: The city performed three Priority Pollutant Scans as part of the application process.
Chromium, zinc, chlorodibromomethane, chloroform, bis(2-ethylhexyl) phthalate, and dichlorobromomethane
were detected. Concentrations detected were less than the acute criteria.
SUMMARY OF PROPOSED CHANGES
Permit Condition
Proposed Changes
Comments
Ammonia weekly
average
Limit of 9.5 mg/I
40 CFR 122 Federal requirements and Division
Policy require weekly limits for ammonia.
Priority Pollutant
Analysis
Include a yearly
requirement to do a PPA
of the effluent
This condition is been added to all municipal
facilities above 1 MGD to collect data necessary for
permit renewal.
Limits and monitoring
requirements for 3.2
MGD
Eliminate from permit
The facility upgraded to 3.65 MGD during the last
permit cycle.
Inflow and Infiltration
Special Condition
Eliminate from permit
The city has a collection system permit with
requirements for maintenance and rehabilitation of
the collection system.
Reuse Special Condition
Eliminate from permit
With any request for expansion the facility will have
to follow the Division's Engineering Alternative
Analysis guidance, which includes among other
options looking at reuse.
PROPOSED SCHEDULE FOR PERMIT ISSUANCE
Draft Permit to Public Notice:
Permit Scheduled to Issue:
NPDES DIVISION CONTACT
December 21, 2004
February 14, 2004
If you have questions regarding any of the above information or on the attached permit, please contact Teresa
Rodriguez at (919)33-5083 ext. 553.
NAME:
REGIONAL OFFICE COMMENTS
DATE:
42//5/2
NAME: DATE:
SUPERVISOR: DATE:
Fact Sheet
NPDES NC0020648
Renewal
Page 2

City of Washington
P.O. Box 1988, Washington, NC 27889-1988
May 13, 2004
Mrs. Valery Stephens
NCDENR Division of Water Quality
Point Source Branch
1617 Mail Service Center
Raleigh, NC 27699-1617
Subject: NPDES Permit Renewal
Permit No. NC0020648
Washington Regional Wastewater Treatment System
Dear Mrs. Stephens,
The City of Washington is requesting renewal of its existing NPDES permit number
NC0020648 of 3.65 MGD for treated wastewater discharge to the Tar River at
Washington.
We have enclosed for your review one original permit renewal application packet and
two copies of the same packet. Upon review of the packet, you will find some of the
requested analytical data missing. The first of these is the Priority Pollutant Analysis
(PPA). The renewal packet was received by the City in late December 2003. This left
only two quarters before the packet was required to be submitted. After a telephone
conversation with Mr. Charles Weaver in early January 2004 to discuss this issue, he
instructed us to schedule the PPA's with our next 3 quarterly toxicity samples (Feb., May
& Aug.) and to note this in the cover letter with the submitted packet
The second analytical information missing from the packet is second species toxicity test.
Again there were only two quarters left before the renewal packet was to be submitted.
Mr. Weaver forwarded me to Mr. Kevin Balden with the Aquatic Toxicology Unit for
guidance on this matter. Mr. Balden recommended collecting 4 consecutive monthly
samples beginning in February 2004. He also advised that the City would need to use
ceriodaphnia as the second species due to the fact that the City currently uses pimephales
promelas as the primary species for regular quarterly toxicity test. The City will submit
the results of these analyses as a renewal packet amendment as soon as all of the analyses
are complete.
Thank you in advance for your consideration with this permit renewal. If I can be of
further assistance or answer any questions concerning this matter, please do not hesitate
to call me at 252-975-9310.
D
102 E. Second St. • Telephone [phone] i l f r i TDD 1-800-735-2962 • Fax [phone]

Respectfully Submitted
4&, W•-
Adam Waters
Water Resources Superintendent
City of Washington
Cc File
Allen Lewis
Enclosure

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Plant Layout
This drawing represents the plant layout with all of the plant structures. The boxed area in
the true southeast corner of the plant, labeled Phase IIA Construction, is currently under
construction. Completion is expected in February 2005. This drawing is not to scale.
Washington NPDES renewal 2004 (NC0020648)

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UNLESS CONTRACTOR CHOOSES TO
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Solids Flow Schematic
This drawing represents the solids flow through the plant. Pipe sizes are indicated on the
drawing. This drawing is not to scale.
Washington NPDES renewal 2004 (NC0020648)

tok
Property Boundary Maps
Map one shows the wastewater treatment plant property outlined in red. Ebb and flow are
also indicated on the map for the Tar River and Kennedy Creek.
Map two shows the wastewater treatment plant property outlined in red. The outfall
discharge point is marked with a red cross.
Washington NPDES renewal 2004 (NO0020648)

THIS MAP IS FOR ILLUSTRATION PURPOSES ONLY.
PREPARED BY : CJTY OF WASHINGTON
PUBLIC WORKSDEPARTMENT
TAR RIVER
112101 Re
WASTEWATER TREATMENT PLANT'
an, ar WA3. WNCTON.MC.
6/18/04
BEAUFORT COUNTY.N.C.
CITY 0P WASHINGTON
PUBLIC WORKS DEPARTMENT
102 E. 2ND ST. , WASHINGTON,N.C. 27889

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Sludge Management
Sludge is thickened in the sludge thicken tanks and stored in the sludge lagoons. Sludge
stabilization takes place in the sludge storage lagoons. Lime stabilization and final land disposal is
contracted.
City of Washington
NC0020648 WWTP
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